The Police Investigations and Review Commissioner (PIRC) are the body who's job it is to investigate the most serious incidents and complaints involving the police.
The PIRC has reported that cases where they are trying to interview and interrogate Police Scotland officers are often 'challenging'.
So, corrupt Police officers who are being investigated for acting criminally are not being co-operative and forthcoming.
And we may have to pass laws to make Police Scotland officers tell the truth.
Who would've thunk it...