A 17-year-old boy was reported smiling and laughing as police arrested him on charges of beating his adoptive mother to death with the but off a shotgun.
Henry 'Hank' Laird had a long history of brutally attacking his mother Linda Laird, 56. The abuse culminated on Tuesday when he mercilessly bludgeoned her to death with 20 strikes to her head and neck at their home in Tulsa, Oklahoma, police say.
Officers also arrested 19-year-old Josiah Sklar, Hank Laird's friend who told police that he saw the attack, but did nothing to call for help or stop it.
Disturbing: Police reported that Hand Laird, 17, was 'smiling and laughing' as he was arrested for killing his mother
'History of violence': Laird's juvenile records show numerous attacks against his mother Linda Laird, 56
Sklar told detectives that he gave the dying woman a pillow and then went into a different room and went to sleep.
Linda Laird was found dead at the bottom of her staircase on Tuesday morning. Sklar and Laird has fled the house and were nowhere to be found.
'Accomplice': Josiah Sklar, 19, allegedly watched Linda Laird die and did nothing to help
He was later arrested at his grandmother's home. Officers said he was 'smiling and laughing,' as they handcuffed him after a standoff that lasted several hours, KRMG-FM news radio reported.
The radio station reports that Laird's juvenile record shows that he began beating his mother in 2007, when he was just 12.
In April 2011, the teen punched his mother repeatedly in the face.
In April 2012, he threw Linda Laird against the wall and choked her.
Each time, Linda Laird told judges that her son was getting better. Each time she vouched for him in court and pleaded for lesser punishment.
However, neighbors told police that she was terrified of her son.
Neighbors told KRMG about a conversation they had with the previous owners of their home about Mrs Laird and her son.
'They thought that he was troubled, and that he could be a threat to her,' the couple said.
'I guess they were concerned about their own safety, asked her "would we be threatened?" and she said "no, he would never hurt you, but he might hurt me."'