domestic incident in harlem. a 911 call from a mother arguing with her son. when a man inside began shooting at the officers. he suddenly, without warning, opened fire on them. in a moment, a young 22-year-old life was ended. and another forever altered. reporter: rivera wanted to motivate young people. in a resurfaced video from his high school days,ry sraeur va gives advice. i want you to hear my voice and know you re going to get through it. you have to put in the work. reporter: while he was in the police academy in 2020, he wrote about his experience watching his brother stopped and frisked by officers. over time, he noticed police in his neighborhood working to change their relationship with the community. that quote is when i realized i wanted to be part of the men in blue. better the relationship between