The arrest follows a wanted appeal issued earlier this month.
Robert O’Brien, 31 of no fixed address, had pleaded guilty to the offence which took place on July 22 last year.
The family of D-Day veteran Jim Booth say he will always be their hero after surviving an attack at his home.
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The body of 61-year-old Scott Lafferty was found at his Bath home on Monday 14 May.
At around 4am on Wednesday 23 May officers responded to a report from a member of the public
Joseph Isaacs tried to murder D-Day veteran Jim Booth at his home in Taunton.