Mark Guest was 33 and was killed on September 7, 2020, in the 2400 block of North 23rd Street in Philadelphia. His death was one of 46 homicides in the city that month during a noted surge in gun violence.

There have been no public reports naming arrests, suspects, or specific investigative developments connected to his killing, and public memorial efforts have sought more information from the community without revealing additional facts.

If anyone knew Mark, his routines, or witnessed anything on North 23rd Street that night, please share information that could help piece together what happened.