Pelley this is our western edition. Three more Law Enforcement officers have been shot today, this time at a courthouse in southwestern michigan. Two are dead. The shooter has been killed as well. Mai martinez of our cbs chicago station wbbm has the latest. Reporter the shooting started in the middle of the afternoon at the Berrien County courthouse about 100 miles northeast of chicago. Sheriff paul bailey broke the grim news. About 2 25 we had a disturbance on the third floor of the courthouse. A person has shot two bailiffs. They are both deceased. Reporter just four days after the dallas shootings, the countrys nerves scraped raw, at least two more Law Enforcement officers were dead and another was fighting for his life. A county official says this time the shooter was an inmate being taken to the county jail when he grabbed the bailiffs gun and started shooting. The fight took place outside the holding cell at the courthouse as they were getting him out of the holding cell. They secured the door, and then the inmate started fighting with the deputy and bailiff, and thats when the gun was able to be taken away. He was trying to escape and thats when he fatally wounded the two bailiffs. Reporter at least one sheriffs deputy was injured and transported to the hospital. Reporter Michigan State police are handling the investigation. Meantime the injured deputy and civilians are being treated at Lakeland Medical Center here in st. Joseph. Scott, right now there is no official word on their conditions. Pelley mai martinez of wbbm. Thanks, mai. President obama and former president george w. Bush will speak tomorrow at a Memorial Service in dallas for the five officers murdered last week. Nine others were wounded. Today we learned that the killer had bigger plans and Manuel Bojorquez is in dallas. Reporter a Law Enforcement source tells cbs news Micah Johnson had hundreds of rounds of ammunition attached to his body when he carried out the attack, an indication he meant to kill more people. 13 officers used force against johnson, 11 fired their weapons, and two used a robot to detonate a bomb to kill him. Today Dallas Police chief david brown defended that decision. He was telling us how many more he wanted to kill. This wasnt an ethical dilemma for me. Id do it again. Id do it again to save our officers lives. Reporter investigators believe johnson appeared to be planning an even larger attack. But saw an opportunity to ambush officers after a protest against Police Brutality thursday night. A search of his dallasarea home revealed bombmaking materials, metal pipes of different length, chemicals, rifles and body armor according to a source. The gunmans father James Johnson spoke to the blaze. I love my son with all my heart. I hate what he did. Reporter his mother, delphine johnson, said the Army Veterans time in afghanistan changed him. The military was not what micah thought it would be. It disappointed him. He was very disappointed, very disappointed. Reporter at todays news conference, chief brown said this about the expectations placed on Law Enforcement. Every societal failure, we put it off on the cops to solve. Not enough Mental Health funding. Let the cops handle it. Reporter he acknowledged police also have work to do. Leaders in my position need to put their careers on the line and make sure we do things right, not be so worried about keeping our jobs. Reporter hes done his job through tragedies before. His patrol partner was killed in the line of duty in 1988. In 2010, his mentally ill son shot and killed a man and a Police Officer before Police Killed him. Dallas officer bervin smith has known brown for 20 years. Youve seen him through those times. Whats that been like . I think its strengthened his resolve to do his job and to persevere through that and stay on point and stick to his goals, be it popular or unpopular, and do what he thinks is right to help the citizens of dallas. I think thats just huge. It speaks to his character i believe. Reporter chief brown said today the investigation into thursdays shooting now involves reviewing 170 hours of Police Body Camera footage and countless hours of Surveillance Video from downtown businesses. Scott, investigators are also still trying to figure out why the gunman wrote the letters rb on a wall with his own blood. Pelley Manuel Bojorquez, thanks. We were struck today by the words of dr. Brian williams, a trauma surgeon at Parkland Hospital who spoke about trying to save the wounded and about race in america. I understand the anger and the frustration and distrust of Law Enforcement, but they are not the problem. The problem is the lack of open discussions about the impact of Race Relations in this country. And i think about it every day that i wasnt able to save those cops when they came here that night. It weighs on my mind constantly. This killing, it has to stop, black men dying and being forgotten, people retaliating against people that are sworn to defend us. We have to come together and end all this. I do simple things when im out in public, when i see Police Officers eating at a restaurant, i pick up their tab. I even one time a year or two ago, i saw a dallas p. D. Officer and i bought a dallas p. D. Officer some ice cream. I want my daughter to see me interacting with police that way so she doesnt grow up with the same burden that i carry when it comes to interacting with Law Enforcement. And i want Police Officers to see me, a black man, and understand that i support you. I will defend you. And i will care for you. But that doesnt mean that i do not fear you. Pelley dr. Brian williams. Omar villafranca has more now on the lives that surgeons could not save. Reporter thursdays attack in Downtown Dallas killed five people who had one thing in common they all wore police uniforms. 32yearold patrick zamarripa, 48yearold lorne ahrens, 40 yearold michael krol, 43year old Brent Thompson and 55year old Michael Smith were killed by an assassins bullet. Sergeant smith spent almost three decades with the Dallas Police department and was only two years away from retirement. His nineyearold daughter caroline remembers the last time she saw her father. Well, he was leaving to go to work and i was leaving to go to the movies, and he said to me, what if this is the last time you ever kiss me or hug me . Reporter did he always say that . No. That was probably the first time he ever said that. Reporter was this kiss any different . Yes. It was. Reporter how . It just felt like something bad was going to happen. Reporter during the chaos, officers ran toward the gunshots, moving people to safety and protecting the injured. Shetamia taylor was shot in the leg. Several officers shielded her and her son from more gunfire. Thank you. God bless you. And just thank you for setting yourself aside and covering us. So i just thank you and god bless you. Reporter the Community Healing process will continue tonight, scott. Thousands are expected at a citywide candlelight vigil. Pelley omar villafranca, thank you. The dallas killings were motivated in part by a Fatal Police Shooting in baton rouge, louisiana, last tuesday. Well, today a search warrant provided one explanation for why an officer shot alton sterling. According to the warrant, two officers saw the butt of a handgun in sterlings front pocket. They say that sterling was shot when he reached for it. The Justice Department is investigating. Since the shooting there have been nightly protests in baton rouge, mostly peaceful, but nearly 200 have been arrested for blocking roads. Today Law Enforcement officials criticized president obama in a private meeting at the white house. They complained that he isnt expressing enough support for police. Mr. Obama said the lawmen were forgetting his past statements. The Vice President was also in the meeting, and late today we asked joe biden about the ready availability of armorpiercing bullets. Dallas mayor has blamed them for penetrating his officers vests. Mr. Vice president , the dallas officers were killed with armor piercing rounds. Why hasnt your administration restricted the sale of armor piercing rounds through the bureau of alcohol, tobacco, firearms explosives . Weve been trying to do that for a long time. Do you remember first bill. Pelley it hasnt happened, sir. I know it hasnt. The first bill to stop armor piercing bullets was introduced by pat moynihan and me years ago. So what we get is the constant, constant, constant pushback from the gun lobby and the republican congress. Pelley what is the sporting purpose of armorpiercing rounds . There is none, zero, zero, zero, zero. Pelley what is the administration willing to do to restrict the sales of armor piercing rounds now, after dallas . Before dallas and after dallas, were prepared to do everything we can to be able to do that and have it stick. Pelley sir, can you be more specific are you going to do something through the a. T. F. . Is it going to be an executive action . Well, there is a debate as to whether or not there is authority under the executive action. I think we have the authority. And there is a concern that if, in fact, we go ahead and do it, what the response will be from the United States congress in a way that may be able to override a veto, but im not prepared to give you more detail at this moment except to say you are right about the total non utility from a sporting perspective of armorpiercing bullets. And we are focusing on it. Pelley is it worth a try even if you face a veto . Ive learned that i have a v in front of my name, Vice President , but speaking for myself, i think it is worth a try. Pelley Vice President biden, were grateful for your time. Thank you very much. Thanks an awful lot. Pelley the Republican NationalConvention Opens next monday, and today the party got to work on its platform. Julianna goldman is in cleveland. Shes either a liar or grossly incompetent. Reporter as donald trump campaigned in virginia and railed against Hillary Clinton, republicans began gathering in cleveland, where trump is set to formally accept his partys nomination next week. Lord, we know that its truly only you who can make America Great again, lord. Reporter but the first task at hand, settling on a platform that spells out the g. O. P. s core beliefs, is already highlighting divisions between trump and party activists. Im going to propose that we insert the language. Reporter earlier today delegates took up issues like samesex marriage and abortion, issues where trump has gone against the grain of republican orthodoxy. One of the more contentious discussions centered on transgender bathroom use. Trump has said such individuals can use any bathroom at his properties. A federal judge today ruled in favor of delegates from virginia who want the right to vote for someone other than trump, but, scott, the movement to deny trump the nomination here is still very much a long shot. Pelley Julianna Goldman covering cleveland for us tonight. Julianna, thank you. Still ahead on the cbs evening news, the controversy over using a robot to kill the dallas gunman. And later in the broadcast, the hottest video game app of the summer. Pelley today the Dallas Police chief defended the unprecedented use of a robot to kill the gunman who had shot 14 of his officers. Heres kris van cleave. Reporter it took the Dallas Police bomb squad 15 to 20 minutes to rig the departments 151,000 bomb disposal robot like this one Dallas Police used last summer to detonate pipe bombs inside a suspects van with a pound of c4 explosive used to kill Micah Johnson. Police chief david brown was unapologetic about the decision to use the robot to kill. I would use any tool necessary to save our officers lives. And im not ashamed to say it. Reporter but the unprecedented action by a domestic Police Department is a concern for peter asaro from the International Committee for robot arms control. Now the idea is out there, and just like i think is the case with many of these shooters where they get inspired by seeing other shooters, i assume that other Police Departments are going to adopt these kinds of tactics. I dont believe its a killer robot. Reporter the Montgomery County maryland fire and rescue department operates one of several bomb squads in the washington, d. C. , area. It has several robots that can use explosives, a water cannon or highpowered air to disrupt suspicious devices. Montgomery county fire chief scott goldstein. Do you feel like these things save lives . These things clearly save lives. They can be repaired. They can be replaced. You cant replace a highly trained and experienced member of the squad. Reporter by all accounts, the Dallas Police essentially jerryrigged their robot to carry that explosive, and it was damaged in the blast. Scott, its important to note these robots are not autonomous. They are remotely controlled and driven by a person who sits inside that truck. Pelley kris van cleave for us tonight. Kris, thank you. When we come back, Hillary Clinton answers the f. B. I. s criticism of the way she handled emails as secretary of state. If you have moderate to severe plaque psoriasis, isnt it time to let the real you shine through . Introducing Otezla Apremilast . Otezla is not an injection or a cream. Its a pill that treats plaque psoriasis differently. With otezla, 75 clearer skin is achievable after just 4 months, with reduced redness, thickness, and scaliness of plaques. And the otezla prescribing information has no requirement for routine lab monitoring. Dont take otezla if you are allergic to any of its ingredients. Otezla may increase the risk of depression. 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Have the conversation with your doctor about oic, and ask about prescription treatment options. Made on behalf of those living with chronic pain and struggling with oic. Pelley coverage of dal pelley coverage of dallas on friday obscured one of the most Important Campaign stories in weeks. Hillary clinton answered the f. B. I. s criticism of her handling of government secrets on her private, unsecured computer servers. The f. B. I. Director announced he would not recommend an indictment, but he had a harsh appraisal. Friday from dallas, we asked clinton for her reaction. Madam secretary, james comey, the f. B. I. Director, concluded that you were extremely careless in handling classified information. How do you plead . Well, i think he clarified that remark during his testimony yesterday, and i appreciated it, as i appreciate the very professional work that they and the department of justice did with respect to that specific question. Pelley secretary clintons use of the word clarified in our interview suggested that director comey had walked back his criticism, but this is what he told congress. Whats your definition of extremely careless, if you could go through that . I intended it as a common sense term. Its one of those kind of you know it when you see it sort of things, somebody who should know better, someone who is demonstrating a lack of care that strikes me as theres ordinary accidents and then theres real sloppiness, so i think of that as real sloppiness. Pelley comey added that if a federal employee was that sloppy with secret documents they would likely be punished or fired. And to the voters who wonder whether you can be trusted with the nations secrets, you say what . I say i have been, and i have proven that over the course of my eight years in the senate, my four years as secretary of state. 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Ive been playing pokemon since i was six, so this is something thats been big for me since i was a little kid. Reporter the classic video game pokemon is among the best loved gaming franchises in history. Since the release last week of its newest iteration, pokemon go, its now one of the most downloaded apps ever. In its first day of release, the game earned nintendo an estimated 3. 9 to 4. 9 million, not bad for a free app. The revenues come from ingame purchases that help players capture the various characters. Using something called augmented reality, pokemon go has brought the classic 90s video game into the real world by tapping into your smartphone, g. P. S. , clock and camera. Pikachu and 150 of his Little Friends can now appear in your office, on city streets, or even here in new yorks central park. Dan ackerman is Senior Editor at cnet. Its kind of giving you the ability to not just sit there on your coach and play a game but get up and go places. You get a benefit from moving around, walking. This is the most walking ive probably done all summer in the last three days. Reporter and in missouri, three teens and one juvenile were arrested for allegedly luring players to a struck in missouri three teams in one juvenile were arrested for allegedly luring players to a location doing a feature of the game cause a beacon. And they robbed them. The game makers warned that players must be aware of their surroundings and the going to unfamiliar places to take a friend. You never know who, or what might be lurking in the shadows. Don baylor, cbs news, new york. And thats the cbs evening news for tonight. For all of us at cbs news, all around the world, good night. Massive party. Right now the future attack about at t park. This is more than a party. Why these people see their mission as a force for change. New at 6 pm. Thousands are gathering this evening for intern palouse up. They have a serious agenda. Jessica . Reporter to conceive the long line behind me. These in turn waiting to get in. Thousands of interns, 1000 of them planning to attend tonight. Companies will try to use all kinds of strategies to attract these interns. I spoke with many to interns that say more than anything, they want to see companies with diverse culture. Reporter walked into any tech company you may find games and the dog and remnants from a party. But what a lot of potential employees want to see is more diversity and women. You get multicreativity. Reporter that is what intern palooza , they are posting new data. 40 of the attendees self identify as women. According to the start up, half of the engineers are women. You want to have a diverse working atmosphere. Even here, we are a startup in and 50 here are women. Reporter last