Police say suspect in murders of billionaire and his wife was caught on video: "This individual's actions are highly suspicious"

Police are asking for the public's help after releasing video of a suspect in the killing of Canadian drug company billionaire Barry Sherman and his wife four years ago.

Toronto Det. Sgt. Brandon Price said Tuesday the suspect spent "a very suspicious amount of time" in the immediate area of the Sherman home around the time the Sherman's were murdered. 

Price provided the public with security camera footage of a man or woman walking down a sidewalk with a hat who seems to kick up his or her right boot as they take each step. The video does not show the suspect's face. Price estimated the person is 5-6 to 5 foot-9 tall.