You are incorrect, the "Chief of Police" does not report to the "County" District Attorney in PA - complete bull$hit. Pennsylvania has several different kinds of "local political units" - a City, a Borrough, a Township, etc... PA also has "unincorporated local municipalities" such as University Park which has its own Public Utilities, Airport, Civic Center, Stadium, Police Force, etc... - the University Park Police Department is a duly-authorized Police Force by the Commonwealth of Pennsylvania and has "Law Enforcement" authority within its jurisdiction. All duly-authorized municipal police forces in PA report to a civilian within the Governance structure of the sponsoring local political entity - within a "City" the Civilian Official is generally elected and given the title of "Commissioner of Police", just as the Sr. Elected-Official within an "incorporated City" is titled "The Mayor". University Park, PA is an unicorporated municipal political entity (created by the Pennsylvania Legislature when they created PSU and "University Park, PA"). The Sr. Executive and police commissioner (i.e., civilian municipal official Police Chief and Police Dept report to) are not elected officials within the prescribed "Governance Structure" of University Park, PA - a bona fide municipal political entity in PA. The Sr. Executive (the equivalent of a Mayor in a City Structure or Municipal Executive in a Township or Borough) would be the PSU President, Graham Spanier at the time. The "police commissioner" was Gary Schultz at the time.
Again, the municipal police always and everywhere report to a civilian within the municipal political entity - they do not report to a "County Level" Official, let alone the County DA.