Authorities have also linked Fleming to the deadly June shooting of 22-year-old Penn State student Billy Schmidt. The brother of a suspect charged in the June shooting of Penn State student Billy Schmidt is also being sought for the murder after he was allegedly involved in the theft of an off-duty police officer's vehicle. What we know:Investigators believe 19-year-old Khadfi Fleming was most recently involved in the theft of an off-duty Philadelphia police officer's car. Penn State student homicideAuthorities on Monday said Fleming is also being sought as a suspect in the June robbery-turned-fatal shooting of Penn State student, Billy Schmidt. Schmidt was a senior at Penn State University, studying digital journalism and media, and was planning to graduate in December.