A Brooklyn man was convicted yesterday of first-degree murder for shooting a 16-year-old girl to stop her from pressing assault charges against his friend.

Kendale Robinson, 21, shot teen Al-Taya Conyers three times on a Boerum Hill street in 2010, then stood over her as she bled, prosecutors said.

“As she lay on the ground she cried for mercy,” Assistant District Attorney Tim Gough said during the Brooklyn Supreme Court trial.

“[Robinson] took that handgun and pointed it at Al-Taya Conyers’ head and pulled the trigger three more times.”

Robinson was charged with first-degree murder because Conyers was a witness to a crime when she was killed. He could get up to life in prison when he is sentenced. A separate jury will continue deliberations today on co-defendant Ronell Bonds.