Dennis Caufield is a socialite and the alleged boyfriend of murder victim Tracy Henderson. It was revealed Henderson was no girlfriend, but a woman he met at a club and flirted with despite already being in a relationship. She rejected his advances, but then was infatuated the next day and wanted him to herself, leading Caufield to suffocate her with a trash bag while bashing her head in. Her murder was attributed to serial killer Peter Ridley, but he denied responsibility.
After his fake alibi, a friend who covered for him on his command, crumbles and his real relationship is revealed, he's made the prime suspect and confronted on the clothes he was wearing. When the detectives from SVU seeing he's still wearing the shoes he wore when he killed Henderson, they arrest him.
He's found guilty of second-degree murder and conspiracy after the fact and imprisoned for life. (SVU: "Hysteria")