Police say 19-year-old Zacchaeus Selby was selling guns on social media and was meeting with 17-year-old Joshua Robinson to sell him one. An argument happened, and police say the buyer shot the seller.

Zacchaeus Selby survived the Timberview High School shooting in Mansfield in 2021. In January, Arlington police said he was killed in his apartment parking garage while trying to sell a gun.

A man has been arrested in connection with the murder of a 19-year-old man who had previously survived a 2021 school shooting, officials with the Arlington Police Department said. Zacchaeus Selby-Mukum, 19, died in January after he was shot in an apartment complex parking lot, police said at the time.