He was suspected of killing his father and people say he is still out there somewhere. One day he got into a fight with a classmate at a birthday party and the classmate threw a lighter and him, burning his face off. Later, he was rushed to the hospital and everyone said he had the ugliest face. He looked in the mirror and said "I love my face! It's perfect!" He then took a knife and cut and extended his smile by cuttings into the cheeks. It's a very disturbing story about a physcopath named Jeff.
I'm sure there's many killers named Jeff...and Tom and Peter and Mary as well. As far as Jeff THE killer, I'm sure it's another stupid urban legend about some guy named Jeff left his claw on a car door of 2 teens making out. Or not.