Reginald VelJohnson played a cop named Carl Winslow on Family Matters, but he also filled the role of Officer Powell in Die Hard. In one scene, Officer Powell states, “I shot a kid. He was 13 years old. Oh, it was dark, I couldn’t see him. He had a ray gun, looked real enough.”
This theory from Reddit user professorhazard suggests that the kid with the ray gun who got killed was Steve Urkel. Devastated, Carl transferred from the Chicago Police Department to Los Angeles, changed his name to Powell, and began a new life. It’s dark, it’s twisted, and it’s going to make Die Hard a little more interesting the next time around.