A former Married At First Sight star received a stark warning from a judge on Monday when he pleaded guilty to cocaine and heroin possession.

Craig Michael Keller, who was previously convicted for assaulting a woman, walked free from Brisbane Magistrates Court this week after entering two guilty pleas.

He was convicted of failing to properly dispose of a hypodermic needle and two counts of possessing cocaine and heroin, after police discovered a stash in his Fortitude Valley trailer four months ago, reported news.com.au.

Magistrate Belinda Merrin slapped the ex-reality TV star, 35, with a $450 fine and convictions recorded, before giving Keller a dire warning about his future.

‘I accept with the diagnoses you have… there are still ongoing challenges [with drugs],’ Ms Merrin said.

‘I do hope you find a way through those, Mr Keller, because, very soon, fines are no longer going to be appropriate.’

Craig Michael Keller, 35, who was previously convicted for assaulting a woman, walked free from Brisbane Magistrates Court on Monday after entering two guilty pleas related to drug possession

JS Legal solicitor Sharan Kang, who represented Keller in court, said the troubled TV star suffered from post-traumatic stress disorder, major depressive disorder, anxiety and substance abuse linked to the six years he served in the Royal Australian Navy.

Keller was a stoker in the engineering team and aided in the security of the ‘boarding party’, where he witnessed ‘gruesome activity’.

‘It’s in that position where he saw some gruesome activity while he was on deployment. He saw live killings in front of him,’ Ms Kang said.

Keller has been engaged with professional psychologists for eight years, with Ms Kang adding that he is receiving a military pension.

The court heard police were called to a ‘disturbance’ in Fortitude Valley on June 15, where they stopped a trailer being pulled by a vehicle.

Keller, who was in the vehicle, was said to have ‘dilated pupils, rapid speech and sweating’, behaviours which were ‘consistent with the consumption of a dangerous drug’.

A subsequent police search of the vehicle found clip seal bags of cocaine and heroin, as well as an uncapped syringe.

Keller was on parole from a prior conviction when the current offences were committed, but authorities took no action.

Keller came to public prominence in 2016 on season three of MAFS when he married Nicole Heir. They split soon after the show finished

He received an 18-month jail term with immediate parole in October last year for an assault conviction.

Brisbane District Court was told Keller engaged in a pattern of ‘controlling and abusive behaviour’ against a woman for a month in 2022.

He was said to have slapped the woman, thrown a glass at her, kicked her in the stomach, and smashed her phone, with the victim telling the court she was haunted by the memories of Keller’s assault.

Keller came to public prominence in 2016 on season three of MAFS when he married Nicole Heir.

The pair attempted to make their relationship work outside of the experiment, but split soon after leaving the show.