A Tongan man who allegedly stabbed a paramedic to death in the back of an ambulance parked outside a Sydney McDonald’s is facing three further unrelated offences.

Steven Tougher, 29, was allegedly murdered on April 14 while taking a food break with his colleague at the end of his nightshift, at Campbelltown in Sydney’s south-west, Sydney’s 9News reported.

Police allege the 21-year-old accused was involved in three incidents in the days prior to Tougher’s death, including common assault, damaging property, armed with intent, two counts of attempted wounding with intent, and stealing.

The alleged incidents all took place in Campbelltown, police said, on April 13 and 14.

They are unrelated to the paramedic’s death.

Tougher had only been in the job for around a year and had married his wife, Madison, five weeks before his death.

Madison gave birth to the couple’s child, a baby girl named Lily-Mae Stevie Tougher, two months after Tougher died.