On the evening of April 13, 2021, 15-year-old Donangelo Castapheny was found shot to death on Olivant Street in the Lincoln-Lemington neighborhood of Pittsburgh. Police were first called to the 1300 block of Montezuma Street about 9:10 p.m. after a ShotSpotter alert, and medics pronounced him dead at the scene a few blocks away. Donangelo was a sophomore at Allderdice High School, enrolled in the Gifted and Talented program, and remembered by teachers and family as polite, thoughtful, and academically successful; he had played basketball for the Westinghouse Bulldogs before transferring to Allderdice.

Investigators later identified two brothers as suspects. Court testimony described an alleged plan to rob Donangelo when he arranged to buy a gun from 14-year-old Hanif Green for $250 in a park. Prosecutors say Green planned to take the money; Green was arrested in November 2022 and has been charged as an adult with murder. His older brother, 34-year-old Riyad Christian, was arrested in June 2023 and faces charges including Criminal Homicide, Criminal Conspiracy, Robbery, Corruption of a Minor, and a firearms violation.

Anyone who knew Donangelo, saw him on April 13, 2021, or has information about the events leading to his death is asked to come forward.