Interactive graphic: High-profile NCR cases

TORONTO – On January 12, 2011, Toronto police officer Sgt. Ryan Russell, 35, was killed while on duty.

Russell was hit by a stolen plow driven by Richard Kachkar, who had been on a two-hour rampage.

Last month, jurors in a Toronto courtroom found Kachkar not criminally responsible.

Although the defence is rarely used, the 46-year-old is the latest person to be declared not criminally responsible, or NCR, in a high-profile case.

The ruling means the person who committed a crime lacked the ability to appreciate what they did or know it was wrong due to a mental disorder at the time.

The interactive graphic below profiles several high-profile NCR cases.

With files from Rebecca Lindell, Global News