“In the witness box, he claimed his mental health issue was triggered during Megan's visit on Friday, August 6, last year. But while on remand in prison, McCullam had suggested he would use his mental health as a "tool" at trial, the court heard.
McCullam - who will be sentenced at
Leicester Crown Court on Friday, December 16 - also claimed, during the trial, that he only used a knife because he was scared people – including Ms Newborough – might be "cross" at him for having strangled her. But a prison guard had heard him joking openly and bragging about using the knife, telling fellow inmates "if I had gone a bit further I’d have taken her head off".
In another incident, he was overheard on a prison landing by a guard laughing as he told other inmates "If you carry on like this, you’ll end up like Megan".
Detective says murderer Ross McCullam would have killed again
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But jurors heard how the young woman had “left clues” to the truth by the defensive wounds and marks on her body inflicted at McCullam’s parents’ home, where he struck.
There were signs Ms Newborough had fought desperately to fend off McCullam in the lounge.
“She was covered in injuries, from her shin to the crown of her head,” said Mr Cammegh.
There were grip marks to both shoulders, and her left arm, likely inflicted as McCullam attempted to “silence” her, and suggesting a “sustained, long, merciless, struggle”.
Her FitBit had also been ripped off in the attack and was later recovered underneath a nearby television.”
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