A video showing Kevin Gregson, the former Mountie accused of killing an Ottawa police officer, being interrogated in the hours after Cst. Eric Czapnik's murder was shown in court Tuesday as Gregson's trial continued.

The lights in the courtroom were dimmed just before noon as the three-hour video began.

In the video, Gregson details his activities in the days prior to Czapnik's stabbing in the parking lot of the Civic Hospital on Dec. 29, 2009. He also talks about wanting to commit suicide and a rare health condition he suffers from. He also calls himself a "monster."