nbc news correspondent stephanie gosk reports. reporter: this weekend police departments on edge after office ofs were shot in multiple cities. an offices was shot, male took off. reporter: houston police grieving one of their own after a traffic stop turned deadly. in d.c. police responded to a man acting suspiciously and he opened fire. one officer sustained nonlife threatening injuries, ul of this as new york is a city in mourning. it hurts my life. reporter: hundreds lining the street as the body of 22-year-old officer jason rivera was escorted from the medical examiner s office. his partner, 27-year-old wilber mora is in critical condition. both were investigating a domestic disturbance when they were shot. police say 47-year-old sean mcneil filed on the police officers in his mower s apartment. police recovered an extended glock pistol that holds you have