UPDATE (Dec. 23 -- 5:27 p.m.) -- Police have made an arrest in a non-fatal shooting on Dec. 15.

Ralph Omar Williams, 36, of McKeesport is charged with attempted homicide, aggravated assault, robbery, reckless endangerment and gun charges.

ORIGINAL POST (Dec. 15) -- Pittsburgh Police from Zone 3 responded to 911 calls of a person found shot at E. Carson and S. 18th Street before 9 p.m.

Responding officers located a male victim with a gunshot wound to the leg. 

He told police he had been in a collision on the 100 block of Pius Street and was exchanging information with the driver when the male shot him, stole his cell phone, and fled the scene. 

The victim then got into his own vehicle and began driving, hitting a vehicle at S. 18th and Sarah, before coming to a stop on E. Carson. 

Medics transported him to the hospital in critical condition. Violent Crime and Crime Scene Unit detectives processed the scenes.

The investigation is ongoing.