A postmaster and his brother are on trial accused of killing a complaining customer.

Edward Brown 51, from Renfrew, and Alan Brown, 63, from Craigton, Glasgow deny the culpable homicide of John McGuire, 56, at Cardonald Post Office in March last year.

Prosecutors claim they were acting together when they held Mr McGuire on the ground and stamped on his body.

It is alleged they also pressed his neck and knelt on his back, restricting his breathing.

READ MORE: Two men deny killing John McGuire in Cardonald Post Office 'attack'

Jurors at the High Court in Glasgow were shown CCTV footage of four people holding Mr McGuire down.

The court heard that Edward Brown had been called a “scummy dwarf” by Mr McGuire earlier that day after he was asked for a receipt for a "wrong purchase".

Later Mr McGuire returned and flashed a receipt at Edward Brown before bringing him to the ground.

Andrew Blackwood, 58, was repairing a photocopier in the back room when the incident began.

He told jurors: “I heard an almighty crash.

“I got up and looked round and a man was on the floor with Eddie, but Eddie was on top of him with his arms over his shoulders.

“The man was kicking and moving and I thought I needed to give Eddie a hand.”

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Mr Blackwood held Mr McGuire’s right leg.

He added: “I needed to stop him getting up because he could have wrecked the place.”

CCTV showed Alan Brown also getting on top of Mr McGuire.

Officers applied CPR to Mr Maguire before paramedics took him to Queen Elizabeth University Hospital.

Mr McGuire was pronounced dead less 14 minutes later.

Edward and Allan Brown both deny killing Mr McGuire.

The trial continues before judge Lord Clark.