Daniel Sharples, 38, roundhouse-kicked Michael Mairs, tipped him out of his chair, then booted him in the head as he lay unconscious on the ground in an unprovoked attack in Warrington

A martial arts thug who murdered a vulnerable granddad in a wheelchair was today branded a “vile bully” by the victim’s family.

Daniel Sharples, 38, roundhouse-kicked dad-of-two Michael Mairs, 53, tipped him out of his chair, then booted him in the head as he lay unconscious on the ground in an unprovoked attack.

The drink and drug fuelled killer fled after the “vicious” attack and amputee Mr Mairs died from his injuries three weeks later, Liverpool Echo reports.

Sickening footage of the attack was released by Cheshire Police with the permission of Mr Mairs’ family.

Sharples later told police his victim previously tried to sell his son “smack” and spice saying “I’m glad I did it and I’ll do it again”.