Akai Gurley was killed on Nov. 20, 2014 when a cop, patrolling a Brooklyn housing project with his partner, fired his gun once.
The officer is scheduled to be sentenced on April 14.
Officer Peter Liang fired in a dark housing complex stairwell.
"His eyes were rolled back," rookie police officer Peter Liang said, his voice breaking. "He was just laying there very still."
Police Officer Peter Liang is accused of shooting into a darkened stairwell, accidentally killing Gurley.
Liang is charged with manslaughter in the death of Akai Gurley.