A man who murdered his former partner has been jailed for life and ordered to serve at least 27 years.

Gary Brown stabbed Alyson Watt 42 times at her home in Paisley, Renfrewshire in June last year.

He also attempted to kill a 16-year-old boy who stayed with Miss Watt with a hammer.

Brown, a former soldier, was sentenced for the crimes at the High Court in Edinburgh on Friday.

Lord Summers told him he had committed an "unforgivable" crime which had left behind "a scene of horror."

In victim impact statements members of Alyson's family said their lives had been ruined by what he had done.

Brown's attack on the teenager had left him severely disabled Lord Summers said Brown had sentenced the teenager to "a living death."

The judge said: "Your behaviour was murderous and unforgivable."

After a failed marriage, Brown met Miss Watt on dating site Match.com around 2015.

But, in March 2017, Brown discovered a text on Miss Watt's phone about a "friendly, drunken kiss" she may have had on a night out.

Jurors heard Brown became "obsessed" by the message and asked a string of people what they believed it meant.

He told the court earlier: "It broke my heart and sent me to hell."

Miss Watt insisted she had been "100% faithful" to him.

But, for weeks, Brown let the text prey on his mind including trawling the web on how to "hack" into Miss Watt's email or social media.

He also searched: "Should I dump my girlfriend after drunken kiss".

The trial heard the relationship appeared to have ended days before the killing.

But, he turned up at Miss Watt's house on June 2 after she got home from work.

He initially told her that it was not a "social call".

Brown then discovered the boy who lived with her standing "frozen solid".

He told jurors: "I picked up a hammer and hit him three of four times."

The former soldier fled the scene and later drove to Dumfries-shire.

He claimed he planned to take his own life, but police later found him in his car.

Miss Watt's neighbour recalled how he tried coming to her aid after hearing her desperately trying to get help.

Brown's lawyer said he was a "very troubled man" as a result of his childhood and his involvement in the Falklands conflict.