Officers received a 911 call from a woman in the Walmart parking lot on Olive Avenue and Loughborough Drive, who said the shots came from another vehicle shortly after 2 am.
[Ads /]
The woman told authorities that the suspect's vehicle, a black Chevrolet Tahoe, had followed them along Highway 99.
Emergency crews treated the victim and then airlifted him to a Modesto hospital in critical condition.
Authorities believe the shooting took place in Merced or Atwater, and that the suspect drove away from the scene.
[Ads /]
The CHP said the suspect is considered armed and dangerous.
Anyone with information is asked to call Investigator Vince Villegas at 209-356-6631.