(Portland, OR) -- Impairment was a factor in two separate injury crashes Sunday morning in Portland. A car crashed into two vehicles on Northeast Martin Luther King Junior Boulevard. The suspect driver walked away from the scene. At least one patient was hospitalized. The suspect's father had the 17-year-old return to the scene where he was arrested for DUI. The second crash happened on Airport Way. A pickup hit a tree. The driver was ejected from the truck and suffered critical injuries.