The stepbrother of Becky Watts sobbed uncontrollably as he recounted how he killed the teenager after trying to force her into a suitcase during a kidnap attempt.
Nathan Matthews, 28, hunched over the witness box, wept and twisted tissue in his hands as he gave evidence during his murder trial at Bristol Crown Court.
Matthews and his girlfriend Shauna Hoare, 21, are accused of killing Becky, 16, in a sexually-motivated kidnap plot at her home in Crown Hill, Bristol, on February 19
, then moving her body to their home and dismembering it in their bath with a circular saw. Becky’s remains were discovered in a shed in Barton Court, just 80 metres from their home.
During three hours of evidence, Matthews was intently watched by his weeping mother Anjie Galsworthy, Becky’s stepmother, and Becky’s father Darren Galsworthy.
Matthews, a former TA soldier, insisted Hoare played no part in Becky’s death or dismemberment.
He went to Becky’s home with Hoare on February 19 with a red suitcase in his boot loaded with a mask, stun gun, handcuffs, tape and black bags, which he planned to use to kidnap the teenager.
Matthews claimed he took the suitcase out of his Vauxhall Zafira when Hoare had gone into the garden for a cigarette. He took the suitcase upstairs to a spare bedroom and then knocked on Becky’s door.
“The door was opened and straight away I used the Sellotape around Becky’s mouth,” he said, before putting on the handcuffs.
Becky did not resist Matthews, who was using a deeper voice, until he attempted to put her in the suitcase.
“That’s when she started, like, wriggling and resisting,” he said. “That’s when I got my fingers on her nose. To restrict her breathing, so that she would pass out.”
Matthews said he punched Becky once, causing her mouth to bleed.
He then tried to do something he had learned in school, “like strangling”, by using his hands to restrict blood flow to her head.
“Obviously, after that she stopped... stopped kicking,” he said. That’s when I moved her head and started moving her legs and pushing her into the suitcase.
I remember I couldn’t hear any breathing, that’s when ‘something’s not right’ and I checked her for a pulse,” he said as he wept.
“There wasn’t a pulse there... she didn’t have a pulse. Obviously, then I shut the suitcase.”
He placed the suitcase in his car and behaved normally before driving home with Hoare. When she went to bed, he moved the suitcase into their front room.
The following day, he drove Hoare back to Crown Hill and left her there. Matthews then purchased drain cleaner, a circular saw, goggles, gloves and masks.
He carried the suitcase upstairs, placed Becky’s body in the bath, then dismembered her, though forensic experts could find no trace of Becky’s blood in the bathroom. “I just did it,” he said. “I tried not to look. I did it and it was just, like, surreal.”
He denied he intended to kill his stepsister or cause her really serious injury.
Matthews then burst into tears, telling the court: “No, no... No I didn’t.”
He denies murder and conspiracy to kidnap. He admits killing Becky and perverting the course of justice. Hoare denies murder, conspiracy to kidnap, and perverting the course of justice.
The residents of the Barton Court property, Karl Demetrius, 30, and his partner Jaydene Parsons, 23, admit assisting an offender.
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