the problem with the Fairfax County Police is the problem with the police nationwide
As I have written over and over, the problem with the Fairfax County Police is the problem with the police nationwide that there is a frightening number of mentally ill people working as police officers.
The Fairfax County Mental Health system had a screening program for applicants to the police department. Psychological interviewing and testing would decide whether the applicant was psychologically appropriate for the stresses of police work.
This program was abandoned by the police many years ago now.