Chester County District Attorney's Office

Shakeem Carter, 20, whose tattoo reads "cutthroat," is accused of murder.

A man who bears a "cutthroat" tattoo on his neck is accused of slashing a teen's throat from ear-to-ear for $350.

"It's horrific. I just can't comprehend how this beast could do something like this," said Kayanna Stutzman, a friend of the victim's family.

Two weeks after investigators found blood all over the walls of a burned-out apartment and then Kevin Allen's body in the ashes, prosecutors charged 20-year-old Shakeem Carter with killing the Norristown, Conn., high school student.

Read original story on NBCConnecticut.com

Carter, also from Norristown, killed Allen for $350 the teen had on him, according to Chester County District Attorney Tom Hogan.

"I can rest and sleep now, knowing that he will be rotting in hell," Allen's mom, Jacqueline Castille-Dixon, said after Carter was charged.

On February 13, police found Allen's body in his father's burning apartment in the Hanover Garden complex in North Conventry Township, Chester County.

Blood was found smeared on the staircase to the second floor apartment and in the entryway.

Carter allegedly sliced Allen's throat from ear to ear. He also stabbed Allen more than 20 times before setting his body on fire, according to the district attorney.

The suspect followed the teen home on a SEPTA bus and attacked him inside the apartment building, according to authorities.

Investigators say the money Carter allegedly stole from Allen was a gift from the teen's father.

"What's the value of a young man's life today? Three hundred and fifty dollars, sadly, is the value of a young man's life today," Hogan said.