The sister of a man murdered after buying a pizza from a fast food shop said a 12-year-old boy has been left without a father.

Paul Mathieson was killed after being found with serious head and facial injuries on Wilson Street in Renfrew on Sunday, January 14.

Mr Mathieson was taken to hospital in a critical condition but later died on January 20.

The 37-year-old bought a pizza from a nearby fast food shop before the attack, having previously been in the Western Bar and the Kind Man's on Hairst Street.

In an emotional appeal, his sister, Amanda Digby, said her brother's death has left "a massive gap" in their family's lives.

She said: "Paul was an average young man but so special to us. He was a brother, a nephew, an uncle, a grandson and a father.

"His murder has left a 12-year-old boy without a dad.

"Paul left that night to go for a few drinks, however, he never returned and we never saw him alive again.

"His death has left a massive gap in our lives."

CCTV footage shows Mr Mathieson talking to another man in Wilson Street.

Officers said the man is then seen punching him to the ground before striking him several times and running off towards Houston Street.

Ms Digby said: "I just want to ask people, please, if you have any information about the crime or the person responsible, please speak to the police and pass on this information, even if you think it's not relevant, still tell the police."

"It's in all of our interests to find the person responsible for my brother's death so please help us and contact the police."