The South Milwaukee Police Department is asking for your help to find 34-year-old Mario M. Johnson.
South Milwaukee PD believes Johnson to be a missing endangered person with mental impairment and the cognitive ability of an 8-year-old.
According to a release from the department, Johnson was last seen around 4:04 a.m. Sunday near 2301 10th Ave. in South Milwaukee. South Milwaukee PD adds he was last seen walking away from a Speedway gas station at that address going northbound on 10th Avenue…