Queensland woman penned a haunting poem prior to being killed in suspected murder-suicide.

Warning: This post contains details about alleged domestic violence, which may be triggering to some readers.

A Queensland woman believed to have been killed in a suspected murder-suicide had penned a haunting poem about her ex-partner’s violent behaviour.

Shelsea Schilling’s mother posted the piece to Facebook this morning, just two days after the 20-year-old’s body was found alongside that of notorious former bikie, Bronson “Lizard Man” Ellery, 24, at a Southport apartment.

“Shelsea wrote this when Bronson was in jail and was scared for her life,” Bonnie Markwell Mobbs posted.

Shelsea Schilling was found dead alongside her former partner Bronson Ellery. Image: Twitter.

Among the poem's more haunting passages: "He had hopes to de-rail me; Box me up and chain me; The man I had I don't even know anymore; So easily he would throw me to the floor and watch me pour; Without hesitation, he's unpredictable; What he's done is unforgivable."

It finishes, "They think they’re living life right. All they want to do is win the fight. There’s people that act and people that do. People that follow through. Follow through with thoughts they have in their head. The type of thinking where people end up dead.”

The poem was accompanied by a message Shelsea allegedly wrote to her friends, warning that "if I get hurt or die Bronson Ellery is responsible".

"To all the girls suffering from domestic violence please speak up," she allegedly wrote. "Be brave, because at any moment anything can happen. And to the guys that are doing this, please seek help."

Markwell Mobbs expressed fears about her daughter's safety just days before her body was found, writing on Facebook, "PLEASE HELP! Has anyone seen my daughter shelsea schilling since 9th Wednesday afternoon? Feared missing. In Labrador. [sic]"

After the tragic news broke, the heartbroken mother expressed her outrage: "Bastard had no life took his and my baby girl," she wrote. "Rott in hell Bronson. Let my angle be safe. [sic]"

Ellery, a former member of the Bandido bikie gang, had numerous run-ins with the law and had been imprisoned on numerous occasions - most recently for perverting the course of justice, according to The Courier Mail.

Investigations into the deaths are ongoing.

If this post has raised issues for you, please call Lifeline on 13 11 14 or contact the sexual assault, domestic and family violence counselling service on 1800 RESPECT.