Thirty-seven-year-old Christian Gulzow was sentenced Friday in Denver District Court on a second-degree murder conviction. He was found guilty by a jury in June.
Prosecutors say Gulzow fatally stabbed 29-year-old Brian Lucero in the parking lot of a Denver restaurant in the early morning of May 23, 2017.
Police have said that witnesses reported seeing a man with white clown makeup with black streaks threatening Lucero in a nearby convenience store.
Authorities have said Gulzow followed Lucero when he left the store and stabbed him in the neck.