The York County Sheriff’s Office Investigations Division is commanded by Captain Franklin Crotty. It is divided into three separate units: Major Crimes Investigations, Special Investigations, and School Resource Deputies.  There are seventeen deputies/investigators assigned to the investigations division. The Major Crimes Investigations Unit has one Lieutenant, one Sergeant and eight investigators and four school resource officers.  The Special Investigations Unit has one Lieutenant and two investigators assigned to the unit.

There is one School Resource Deputy assigned to each of the counties four high schools during the school year.  During the summer months the school resource deputies perform regular patrol duties.  York County School Resource deputies are fully certified deputy sheriffs.