A drug addict who deliberately broke his month-old baby daughter's arm has been jailed for six years.
David Bradley was changing the girl's nappy when he pulled her arm until it "clicked", Teesside Crown Court heard.
He said he heard voices telling him to kill someone but psychiatrists found nothing mentally wrong with him, the court heard.
Bradley, 26, of Bale Drive, Thornaby, admitted causing grievous bodily harm with intent and child cruelty.
The court heard he did not tell the baby's mother what he had done and went on a two-day alcohol and cocaine "bender".
Rachel Masters, prosecuting, said: "Bradley said he had been having thoughts about killing people, and voices told him to break his daughter's arm. He pulled it and heard the arm click.
"He was examined by a psychiatrist, who said that there was nothing mentally wrong with him."
The girl's arm was broken on 3 October last year.
Shaun Grainger, defending, said: "He showed such remorse that he went to a Newcastle police station in a very distressed state.
"He was changing the child when he heard this voice from a deceased uncle telling him to commit this offence. When he had done the act he said to himself 'Oh my God, what have I done'".
Judge Tony Briggs said: "This was an appalling offence - you are a risk."