Mark Trizanto was 42 when he was last seen in Toronto on August 4, 2017. The last confirmed sighting placed him at about 1:00 p.m. near Roncesvalles Avenue and The Queensway. He was described as Black, about 5 feet 8 inches tall, roughly 130 pounds, with a slender build. That afternoon he was reported wearing black jeans and a blue T-shirt and carrying a black backpack.

The publicly released record does not include any verified movements after that sighting, nor does it report belongings found, vehicle or phone activity, or reasons for his disappearance. The Toronto Police Service Missing Persons Unit is the investigating agency (police reference 2017-1401237.D11) and the case is listed nationally as 2017044551. If anyone saw Mark or has information about his movements around Roncesvalles Avenue and The Queensway on August 4, 2017, please contact the Toronto Police Service Missing Persons Unit or Crime Stoppers.