DETROIT (AP) — One of two teenagers charged in the slaying, burning and beheading of a man was sentenced Wednesday to 20 to 30 years in prison.

Wayne County Circuit Court Judge Annette Berry sentenced Alexander Letkemann in the Nov. 7 slaying of Daniel Sorensen, 26.

Letkemann, 18, also was sentenced to three to 10 years for mutilation of a corpse. The sentences will run concurrently.

He received a stern lecture from Berry, who asked why Letkemann didn't do something to stop his friend, Jean Pierre Orlewicz, from killing Sorensen in a Canton Township garage belonging to Orlewicz' grandfather.

"This was a premeditated, calculated act. Nothing short of violent, sadistic pleasure," said Berry, leaning forward toward Letkemann in the Detroit courtroom.

"This is what the court doesn't understand. What's missing inside? There's something missing here, fundamentally missing and it's called compassion for human life."

He couldn't find a reason for his actions, Letkemann told Berry.

Letkemann, of Westland, had pleaded guilty earlier this month to second-degree murder, admitting to helping prepare the garage for the ambush on Sorensen and helping dispose of his body.

Letkemann also testified that Orlewicz, 18, of Plymouth Township, slit Sorensen's throat and repeatedly stabbed the man.

Orlewicz faces mandatory life in prison after his first-degree murder conviction last week.