Washington: A US man allegedly killed his girlfriend`s 5-month-old baby, after the boy wouldn`t stop crying, while he was watching a football match on TV. Tre`viance Markese Walker, 22, from Oklahoma, US was looking after his girlfriend`s baby for a few hours on December 7 while he watched a football match on TV, police said.

After the baby`s incessant crying, Walker allegedly grabbed the baby so hard that he caused head trauma and hematoma on the brain, which autopsy revealed killed the infant, `Fox 25` reported. He also dropped the infant from a height of two-feet, the report said. The boy was found four hours later "unresponsive" with bruises in his head and blood in his ear.

The infant was taken to a local hospital where he was soon pronounced dead. A neighbour reportedly heard Walker saying he grew angry because, "the baby wouldn`t stop crying," police said. Walker was arrested and police said he initially denied that he had harmed the child but later admitted the abuse.