In Chicago, the police union has attempted to destroy complaint records and uses an arbitration clause to minimize impact of discipline and to keep information about sustained misconduct complaints under wraps, including other police departments considering hiring an officer (https://projects.propublica.org/graphics/il-grievances).
(Full disclosure, I'm a co-author of the OP linked article and the article about CPD grievances.)
In Chicago, the police union has attempted to destroy complaint records and uses an arbitration clause to minimize impact of discipline and to keep information about sustained misconduct complaints under wraps, including other police departments considering hiring an officer (https://projects.propublica.org/graphics/il-grievances).
(Full disclosure, I'm a co-author of the OP linked article and the article about CPD grievances.)