A CONVICTED killer is back behind bars after a brutal attack left a man needing surgery on his manhood.

Steven Souley, 26, stormed a house party on Christmas Day 2014 before pouncing on his victim.

The crazed thug and accomplice Zico Malavin, 20, repeatedly hit the 25-year-old with an axe and knife leaving him scarred for life.

Souley was only back on the streets around six months when he struck again.

In 2011, he was locked up – along with Zico's brothers Angus and Zak - for his part in the killing of dad Andrew Curran in Glasgow's Maryhill Park.

Souley was sentenced to seven years for culpable homicide – but in May 2014 he was deemed safe enough to be freed early.

However, he now faces another jail term after he and Zico Malavin admitted assaulting the 25-year-old man to his severe injury and permanent disfigurement.

The duo, both of Drumchapel, were remanded in custody and will learn their fate next month.

The attack happened at a Christmas party hosted by their victim's sister at her flat in the city's Summerston.

Souley and Malavin suddenly turned up around midnight uninvited.

Souley was armed with an axe with Malavin – sporting a red Christmas jumper - was clutching a knife.

The sister – who knew the pair – demanded they get out.

Prosecutor Allan Nicol then told the High Court in Glasgow: “[The victim] tried to put them out, but, as he did so, both attacked him.

“He was repeatedly struck on the head and body with the axe and knife.”

The duo were eventually forced out and they fled the scene. Their blood soaked victim meantime was rushed to hospital.

Souley and Malavin were initially not traced by police. A knife and a Christmas sweater were later found at a property linked to Souley.

It was months later before the pair were finally charged with the attack, but both made no comment.

The court heard their victim needed an operation to repair a “deep wound” to his groin and to his penis.

He also suffered injuries to his head and hand. He was released from hospital days later, but will be permanently scarred.

Souley and Malavin will be sentenced in Edinburgh next month.

Souley was jailed in 2011 after being convicted of the culpable homicide of 41 year-old Andrew Curran.

Angus Malavin was locked up for 18 years and younger brother Zak for 17 years after they were found guilty of murder.

Mr Curran died from a sword wound to the neck. The fatal park attack happened following a row over a bottle of Buckfast.

A fourth Malavin brother – Kris – was jailed for seven years in 2014 after he tried to run down and kill a key witness in the murder trial.