The Brief Tacoma police have launched a homicide investigation after a pedestrian struck by a vehicle on Monday died from his injuries on Thursday. Detectives are coordinating with the Pierce County Prosecutor's Office to update the charges, and the investigation remains active. A homicide investigation was launched after a man struck and killed another man with his car in Tacoma's Eastside neighborhood on Monday. What we know:On Thursday, the victim died from his injuries, prompting authorities to reclassify the incident as a homicide investigation. Detectives will now work with the Pierce County Prosecutor's Office to update the appropriate charges for the suspect.