Shooting in San Francisco, but tonight a picture is emerging of the shooter, a disgruntled employee who apparently felt overworked. First we have identified the gunman as 38yearold jimmy lam. He and the victims all worked as drivers for ups. We saw investigators removing potential evidence from lams home in the richland district this afternoon. He shot and killed three people before killing himself. Three other ups workers were treated and they have now been released from the hospital. But the warehouse is the distribution facility situated alongside highway 101. It sits between 16th and 17th streets and utah street and san bruno avenue. Ktvu Heather Holmes is here tonight to begin our coverage, heather . Well julie and ken can, we learned the gunman had worked for ups for 17 years. The official with the teenster unit said he complained of excessive overtime, but no one foresaw what happened this morning. The shooting took place at the ups package Distribution Center at the hood of the trail hills. Its a building so large it takes up a city street about 8 50 this morning when police got the call. You could see several shots of the ups building and under several people who were shot. Delivery drivers were attending an informal Daily Briefing. One of the workers pulled out a gun and opened fire. Responding Officers Determined it was an active shooter situation. Please respond, active shooter at the ups village. Reporter the first officers on the scene formed teens and immediately got the wounded victims to safety. One officer encountered the suspect. One contact team located the suspect who was still armed and with an assault victim. The workers were searched, then let go. From our sources and witnesses weve learned the gunman first opened fire inside the building where the delivery trucks are parked. Two workers were shot there both wounded. Our sources say the gunman then went outside the building where they shot and killed three people. He was back inside when police confronted him. At this time we have identified six shooting victims including the suspects. We learned the gunman is jimmy lam. Our sources say he had worked for ups since 1999. Today he came to work with a backpack and two guns. Their officers never fired a shot. Mayor ed lee credited First Responders for their heroism. Proactive efforts from our Police Department and all the other agencies that responded to help save lives. Reporter ups employees an estimated 300 workers at this facility. They have made professional counseling available. And if i could at this time just ask all of you to please put us in your prayers and all of those impacted. I am most concerned about my employees to make sure we have as many counselors that are needed on site for all of their support and to make sure we take care of each other. Reporter now the two Wounded Warriors were treated and released. As for the gunmans motive, the grievance was a request of ups to relieve him from working overtime Going Forward. My indication as to why he was upset and maybe with other employees in the company. It is such a terrible thing and so much chaos and confusion after the shooting. It was really a test for the city as the huge multiagency response went into this. Yes, it really was and every officer on duty was called. They were there at the scene for several hours, even after they were notified about the suspected gunman being dead. Because they didnt know if there was another shooter possibly involved. You also need to think about this happening when there are hundreds, possibly the employees there at the time. Some of them as soon as they heard shots were fired they went to other areas of the building seeking cover and so officers needed to make sure everyone was accounted for and they knew the threat was over. So thats why it took hours to get them to clear the scene. Heather . Thank you. Sure. The coroner has not yet identified the three people killed. We learned their identities from coworkers, but they are withholding two of the names until its clear next of kin have been notified. However one of the three victims has been identified by family members. Our Team Coverage picks up with amber lee and a special gathering tonight in their memory, amber in ken, im going to speak softly out of respect for the memorial behind me. Were in the Diamond Heights neighborhood where they had a familiar and friendly face and the Shopping Center was a part of their root. They are kind of the protector of the neighborhood. They didnt just deliver packages. And they were totally a part of our community. At the Shopping Center neighbors and friends created a memorial of flowers and notes for ups drivers known as big mike and with a big heart. It was a nice personality in our neighborhood. Reporter those who gather here have known him for more than a decade and he was much more than a ups delivery man. They say he would shout out when they saw him from afar. Every day i would see them. Now im going to miss him. Reporter he would talk about their favorite sports team. The San Francisco giants and their families, their wife danielle, and their five children. They would always talk about the kids. And the love he had for his family. Reporter lefiti and two other drivers were outside the building when they were shot and killed. They were the people who would literally give the shirts off their backs, literally. Very nice guys. Reporter hes with the Teamster Union and knew all the victims and the man accused of killing them. One victim talked about retirement after 30 years with ups. They spoke to the gunman a few weeks ago. Jimmy lam knew about the overtime grievance, but thats the common complaint from drivers. He had no idea why lam killed his coworkers then turned the gun on himself. I have no inclination. This is a senseless act. Usually well hear there is an issue between two people. Ive never had any issues with jimmy lam. Reporter back at memorial friends are trying to make sense of the deadly shooting that suddenly took the life. We are devastated. Reporter the union rep tell me the two victims who survived, one was shot in the leg and the other in the arm. Both have been released from the hospital, ken . Very difficult time for a lot of people tonight. Amber, thank you. And we are also learning more about the gunman in todays deadly shooting. 38yearold jimmy land. This afternoon they searched their home in the citys richland district looking for evidence. Among other things they confiscated a computer and several boxes of files. Neighbors describe lam as a quiet man. They would see him come and go in their ups uniform, but mostly kept themselves. They are stunned by the violence tied to a man who lives so close. And it is really creepy the people next door have the ability to shoot people off of what they work for. That really creeps me out and i dont feel safe. And very sad, of course. For the people that got killed. Its very shocking to see something you never expected. And never a ups employee who told us lam was also a very quiet man at work. For ups workers it was a terrifying and traumatic day in the middle of all the chaos they were eager to let the families know they were okay. Ktvu rob roth spoke to workers who survived and reunited with relatives this afternoon. Ups workers were shocked and grief stricken and how something so awful could happen. It seems to be another work day. One ups worker parked in the driveway and was about to go inside when they heard the sound of gunfire. Six to seven shots. Like bam bam bam. I started screaming get out, get out. Gun shots, go, go, go. Reporter he didnt note gunman, but one of the victims were a friend. Its shocking. Your life goes so quick in front of you. Reporter some relatives gathered outside the police perimeter. And how is that working . For a time she didnt know if the 21yearold son was hurt or worse, but later learned he was okay, both thankful and upset. This is a scared situation to come up. Not for anybody. And they also waited to hear their daughter. I feel for the parents and their families and their loved ones and the people that are there. They are not okay. But i know my daughter is okay right now. Reporter and finally just after 12 30 Police Escorted the workers out. Thank you, thank you. And this was a day of relief for those who made it out safely, but it is also a day of anguish knowing some did not. In San Francisco rob roth ktvu fox 2 news. Coming up more gun violence. This time targeting Congressional Republicans practicing for a baseball game. What weve learned about the shooter plus the president s hospital visit tonight. And at 10 30 a grieving bay area father opened up about the accidental shooting of the teenage son. We were a technical finish. And we thought we were going to go before them. The advisory will go into effect in 24 to 48 hours. Ill let you know how hot it will get in your backyard and how hot the heat advisory will be how long the heat advisory will be staying with us. When you eat a subway® 6 footlong sub of the day. Its the taste you love, at a price you cant get enough of. The 6 footlong sub of the day. Seven days, seven footlongs, seven more ways to enjoy subway®. Tonight President Trump and First Lady Melania Trump made a visit to the hospital where wounded congressman Steve Scalise is recovering after he and three other people were shot during practice for a Charity Baseball game. Two of the wounded were members of the congressmens security detail. They returned fire killing the gunman. The shooter was targeting republicans and has been identified as a vocal critic of President Trump and the gop. Fox news correspondent carolyn shively joins us live from washington with the latest. Reporter congressman Steven Scalise is one of the worse injured today. He was injured in the hip, shot in the hip. He had surgery this morning followed by a procedure to stop the bleeding. Were told he will need a few more surgeries. He remains in Critical Condition tonight as mr. Trump visited him here in the hospital. Is gunfire erupted wednesday morning in alexandria as Congress Members practiced for a baseball game. Steve scalise was critically injured, a lobbyist, and staffer were also shot. Others were hurt as they dove for cover including texas congressman roger williams. The thin blue line held today. Law enforcement officers everywhere should be proud. Reporter President Trump among those praising the officers who risked their lives to save others. How our Brave Capitol Police performed a challenging job with incredible skill and their sacrifice makes democracy possible. The shooter was fatally shot by Police Identified as James Hodgkinson of belleville, illinois. He had been living in a van in alexandria since march. We are asking and speaking with the individuals who know them personally. Who may have encountered him on their travels. Reporter the 56yearold had a history of antigop activity and apparently had been a volunteer for Bernie Sanders 2016 campaign. I condemn this action in the strongest possible terms. Reporter hodgkinson was arrested in the 1990s for resisting police and drunken driving and in 2006 for misdemeanor battery. You never back down from anybody in a bar fight or whatever. He stood his ground. Reporter President Trump also met with crystal griner tonight one of the two special agents who helped bring this gunman down. She was shot in the foot, but tonight in good condition. Julie back to you. Thank you. New shootings in virginia and San Francisco seem to support data suggesting an increase in Mass Shootings in recent years raising questions about whether there is any way to stop them. New at 10 00 Jana Katsuyama live in the newsroom with some perspective. Jana . Reporter ken, the term mass shooting is not defined by Law Enforcement. One Nonprofit Group has been tracking shootings with four or more people injured or killed. Their data shows an increase in recent years. The vulnerability of the ups workers just going to their jobs in San Francisco. But the Congress Members are playing a game of baseball shattering a sense of peace for Many Americans wednesday. Prayers came from both republicans and democrats. California senator Dianne Feinstein on twitter said the continuing amount of gunfire is disheartening. We must do more to discuss the causes of these tragic events. Eric swallow also searched for answers. You want to understand what the motivation was from a Law Enforcement perspective and also just from a policymakers perspective. A Nonprofit Group that tracks gun violence shows a recent increase in Mass Shootings, which they defined as four or more people injured or killed not including the shooter. 274 in 2014, 384 last year. And this year wednesdays San Francisco and virginia shootings bring the number to 154 so far. Uc berkeley law professor is the director of the criminal research program. He says wednesdays shootings highlight an ongoing state of life in america where guns are readily available. Vulnerability that we have particularly in public spaces to being undefended. Whats clear he says. The number of handguns out there to be acquired has gone up in this population. Reporter he says the category of Mass Shootings is not recognized by Law Enforcement and there are no easy solutions. Often it is difficult to tell in advance who will take legal action. Even californias strict gunfire law offers strict protections. As long as ownership and availability are very high, the capacity of those laws to stand between. Its people who want to require them and it is quite limited. Reporter some say the number of Mass Shootings might have been higher. There are an estimated 55 million gun owners in the united states. Jana katsuyama live in the newsroom, thank you. A security scare led to a lockdown at Travis Air Force base in fairfield this afternoon. Officials say the base was on the first day of the multiday Security Training exercise when someone reported hearing a gunshot around 3 30. Officers responded telling base residents and staff to close their doors and windows. After an investigation it turned out to be a false alarm. I think it is derived from a heighten sense of awareness based on number one the exercise and potentially some of the incidents happening around the country in the last few days. The commander says authorities are still looking into exactly how the report of gunfire came about, but officials responded appropriately given the information they had. We noticed the last couple of days temperatures have been coming up continuing to heat up to the point where you are on the weekend with the heat advisory and temperatures are really getting up there. We will see triple digit heat especially in the inland valley. Again this sunday and monday, weve got a little heat wave coming our way. The heat advisory, excessive heat advisory will go into effect on friday. Right now its clouds to the north with no fog offshore. A warm start to your day on friday. A little fog, but not much. Itll warm up quickly. So currently its 73 in concord. Its 5 degrees warmer than last night at this time. So its already warmer in all locations with no fog offshore and winds are light. Warm to hot day tomorrow. So the model does just this. No fog, but they will try to bring some fog at the coast, but not really. Look for the reds, those are 90s. They will pop in. 80s and 90s, so the reds are coming into parts of napa and all the warmer colors are moving west as we go through the next couple of days. Thats the temperature footprint for thursday. Friday will be more aggressive with that and reds pulling all the way into parts of the bay area. When i come back well take you through the entire heat wave. Just know tomorrow the first day youll start to notice the heat inland. A stunning new development in the case of the embattled bay area prosecutor. Coming up the District Attorney resigns after pleading no contest to a felony. The warriors announced head coach steve kerr will be back, but another key executive is out. Jason appelbaum has that and more later in sports. And in 11 minutes the catastrophic fire that tore through a london Apartment Building and the death toll still influx. Mark peterson resigned today after pleading no contest to a felony perjury charge. In exchange for the plea 12 other felony counts including misuse of Campaign Funds were dropped. Protesters rallied in front of the courthouse this afternoon calling for peterson to step down. No one is above the law. Mark peterson apparently thinks hes above the law. Peterson was sentenced to 250 hours of Community Service and three years probation. Last december he was fined 45