A short time later, the SUV in question was pulled over at 7th Street and La Paz Drive. Deputies said they found a bloody knife inside the vehicle and also noticed the SUV had front-end damage and was smeared with blood.
Contreras is in custody for attempted murder.
Investigators say Contreras and his friend argued with party organizers, which escalated to a fight in the parking lot. Police say Contreras took a knife from his vehicle and stabbed a 31-year-old male victim in the side of his chest, puncturing his lung.
The victim is being treated for a critical stab wound and other trauma caused by the vehicle. The other three victims were not seriously injured.