The road-rage incident occurred in the 1400 block of S. Gilbert Street at 6:56 a.m.
According to Hemet police, the victim, identified by his family as Tracy Leavitt, had his car stolen and was confronting the alleged car thief's friend when the car thief hit Leavitt with his own vehicle.
After hitting Leavitt, the two suspects abandoned Leavitt's car and fled the scene in a white 2006-2011 standard cab Ford pickup truck.
A 17-year-old boy was arrested in the 100 block of N. Buena Vista Street on Tuesday night in connection. Investigators were able to identify the second suspect as 18-year-old Michael James Williams of Hemet.
On Thursday night, Williams turned himself in at the Hemet Police Department and was arrested for attempted homicide and conspiracy. He remains at the Riverside County Jail in lieu of $1 million bail.
RAW VIDEO: Man hit with own car in Hemet road-rage incident
Leavitt suffered a collapsed lung, multiple broken bones and now needs hip and knee replacement surgery. His family has set up a GoFundMe account to help pay for his medical costs. You can donate here: www.gofundme.com/b35wutb3u5w.
If you have any information on this investigation, you're urged to contact the Hemet Police Department at (951) 765-2324.