'Beloved' victim's family 'left with life sentence' as martial arts instructor jailed for one-punch killing

A professional martial arts instructor who killed an innocent passerby with a single punch in a late night street assault has been jailed for five and a half years.

Jonathan Dargan (49) was found guilty of killing Patrick Mullally (56) by knocking him to the ground with a punch after the victim and another man had stopped to intervene in a drunken row with his girlfriend.