Does the ghost of Thomas Cook (charged and convicted of his wife's murder in 1860,) still reside in the old courthouse or did the removal of his "death mask" put him finally to rest?

According to John Robert Colombo in Mysteries of Ontario, workmen in 1982 complained about their tools being moved about or missing, lights being turned on and off without human intervention and a "scary face" being seen in a tunnel leading to an old air duct...

Could this be the unfortunate Cook? His death does rate as grisly... He was improperly "hung" when his sentence was carried out... instead of the "long drop" meant to snap the neck, the drop was a little too long and tore his head from his body. Thus decapitated, a "death mask" was taken of Mr. Cook and proudly displayed on the door of the county jail house.

After the 1980s renovations, the "death mask" was removed from the courthouse and since then, there seems to have been little problems from the resident ghost of the courthouse.

Just a quick clarification on your version of the Thomas Cook haunting of the Oxford County Court House in Woodstock.

The hauntings during the renovations of the courthouse in 1982 only STARTED when the death mask was removed. The thing was subsequently hung back up as part of a doorway archway and the hauntings stopped.