The two Cleveland police officers involved in the fatal shooting of Tamir Rice, a 12-year-old boy who was carrying a pellet gun, stood by without rendering medical aid as the boy lay wounded next to their patrol car, a newly released extended surveillance video shows.

Then, about a minute and a half after one officer had shot Tamir, the other officer tackled the boy’s 14-year-old sister as she tried to reach her brother. Tamir was shot Nov. 22 after someone called 911 to report “a guy” who had been pointing a “probably fake” pistol outside a community recreation center on Cleveland’s west side.

The video, obtained by the Northeast Ohio Media Group, provided fresh detail about a shooting that roiled Cleveland and quickly became the latest shooting to be absorbed into a broader national narrative about police violence in African-American communities.

The surveillance tape also seemed to clarify an issue in the shooting investigation: that the officers provided no immediate medical assistance to Tamir, who was not pronounced dead until more than nine hours later at a Cleveland hospital. An autopsy by the Cuyahoga County medical examiner later found that Tamir died from a gunshot wound to the abdomen. In addition, it confirmed the account that Tamir’s mother, Samaria Rice, gave in the weeks after the shooting, that the police had tackled and detained her daughter as she rushed out of the recreation center, trying to reach her brother’s side.