A man who shot dead his his daughter’s ex-partner and her ex-partner’s father to over a family court case involving his grandson is to be sentenced on Monday.

Stephen Alderton, 67, was arrested hours later by armed officers on a motorway and told police that “sometimes you have to do what you have to do even if it’s wrong in the eyes of the law”, said prosecutor Peter Gair.

The barrister told Cambridge Crown Court that Alderton, who wore a crucifix necklace as he appeared in the secure dock, had written in a telephone message last year: “I’ve a shortlist of people I intend to murder.”

The defendant, of no fixed address, pleaded guilty at an earlier hearing to the murders of Joshua Dunmore, 32, and his 57-year-old father Gary Dunmore on March 29 this year, and his sentencing began on Friday.

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