The supervisor in charge of the London Police Service's Human Trafficking Unit faces three charges under the Police Services Act after he allegedly let a fellow officer go after the officer was arrested during an anti-prostitution sweep back in April. It's also alleged the supervisor then tried to cover it up.

Sergeant Michael Hay is charged with discreditable conduct, neglect of duty and insubordination under the Police Services Act in connection with an incident that occurred on April 18.

The allegations were presented at a hearing for Hay held in front of an adjudicator on Tuesday.

Documents from the hearing said that Hay was working as the supervisor in charge of the Human Trafficking Unit when he directed "the unconditional release of a police officer from another service after his lawful arrest during a proactive operation plan targeting subjects who were purchasing sexual services of females."

According to the allegations, Hay not only "provided preferential treatment" to the officer suspected of being a john, but "because he was a police officer," Hay also tried to hide the fact that he did it from his superiors.

Notifying a supervisor when a member of a police service faces criminal charges is established London Police procedure, the documents note, and Hay not only failed to mention it to his superiors, but allegedly "took proactive steps to hide" it from them.

Hay has since been re-assigned.

"Sergeant Hay remains on active duty and is currently assigned to a patrol section with the uniformed division," said Const. Sandasha Bough, a spokesperson for the London Police Service.