The St. Joseph County Coroner's Office says Robert Perez has died.
Coroner Mike O'Connell says an autopsy was performed today.
The official cause of death is pending, but O'Connell says it looks like Perez died of a brain injury.
Perez was involved in an accident that happened a little before 8:00 P.M. at Ireland Road and Linden Road on March 7th.
Police say Trooper William B. Ennis was driving west on Ireland, and 19-year-old Robert Lee Perez of Mishawaka was heading south on Linden.
Ennis, Perez and Perez's passenger 20-year-old Danielle Cutler of South Bend were taken to a local hospital.
Ennis was treated and released, while Perez is in critical condition and his passenger is in serious condition.
There is no cause yet for the accident, but police are looking for a possible witness. He drives a yellow, older model pick up truck with plastic over the rear window. Police say he stopped after the crash and then kept driving.
Police are asking him and any other witnesses to contact the Indiana State Police
