Percival Giles

Percival Giles was a chief constable after Stockton retired.

Biography
We first met Giles as an inspector at the end of season 4, called in to Station No. 4 to investigate murder Murdoch is implicated. He is punctilious, rigid, humourless and difficult. He is also perceptive and clever, and a very good policeman, Which is why Murdoch ends up in the jail cells of Station No. 4, having been expertly framed by Constance Gardiner. Though eventually proven innocent, Murdoch suffers the consequences of that ordeal for years to come. Giles accepts that Murdoch was framed by Constance Gardiner, but doesn't accept Brackenreid's explanation for her escape; that the cell door was broken, and she took advatange. The audience knows Brackenreid is not telling the whole truth, and so does Giles. Giles simply doesn't know why. ("Investigating Murdoch Mysteries").

"Nolo Contendere" (2015)
Giles is in prison with Constable George Crabtree.