Unified Police are searching today, for Mark Peterson, 33, the stepson of a man who's now hospitalized in critical condition.

Police believe a domestic dispute escalated, and Peterson purposely ran into his stepfather, 51, as the victim was attempting to write down his license plate number.

The incident occurred outside a Taylorsville home, on 27th West, near 47th South.

Police say the suspect was driving a silver, 2002 Chevy Malibu.