Boy, 13, killed half-sister, 5, with wrestling moves, police say

(CBS/AP) NEW ORLEANS - A 13-year-old boy from a New Orleans suburb has been arrested after authorities say he told them he used TV wrestling moves on his 5-year-old half-sister, who died from the beating.

Jefferson Parish Sheriff's spokesman Col. John Fortunato says the boy was arrested Tuesday after a coroner's investigation found the girl died of multiple injuries, including broken ribs, lacerations of the liver and internal bleeding. CBS affiliate WWLTV reports the 13-year-old is charged with second-degree murder.

Deputies say they received a 911 call from the Terrytown home on Sunday afternoon and found the girl unresponsive. She was pronounced dead a short time later.

Investigators say the teen told them he repeatedly slammed the girl on a bed, punched her in the stomach, jumped on her and struck her with his elbow several times. The incident reportedly occurred while the girl's mother, 39-year-old Adlourdes Desvallons, was at the store.

Fortunato says the boy told homicide detective Matt Vasquez that he continued punching the victim even after she complained that she was hurting, the station reports. He only stopped after his mother called on the phone to check on how they were doing, Fortunato said, according to the station.

Police say the boy told authorities he called 911 after the 5-year-old stopped breathing.

Authorities say the 13-year-old was smiling and appeared to enjoy talking about the wrestling moves and physical abuse during a police interview on Monday, the station reports.