Police in Waterbury, Conn., allege the man's stepmother locked him in his room with limited food and water for over 20 years, until he started a fire using hand sanitizer, printer paper and a lighter.

The man, whose name has not been disclosed, was emaciated and weighed only 69 pounds (31 kilograms) when he was rescued from the two-story house in Waterbury after starting the fire on Feb. 17.