'Non-suspicious' death suddenly becomes murder investigation

The death of a Queensland man originally considered to be non-suspicious has escalated into a murder investigation.

A week after he was found dead in his unit, forensic tests revealed that young dad James Switez-Glowacz met with foul play.

The 36-year-old's body was found in his Wynnum West unit last Thursday.

The death of James Switez-Glowacz is now considered to be suspicious. Source: 7 News

Police initially suspected the death was from self-harm, revealing that he was known to them and had a history of mental health problems.

James leaves behind a five-year-old daughter. Source: 7 News

After a post-mortem revealed James died with serious injuries, the investigation switched focus.

On Facebook, James' father posted: "I loved my son immensely and I'll miss him so much.

"He leaves a beautiful 5 year old daughter who'll be the focus of all our family's love."

James's father posted a heartbreaking message on Facebook. Source: 7 News

Neighbours say James had been living alone in the two bedroom flat for the past ten months but was often visited by a woman and his young daughter.

Acquaintances are now being quizzed as the hunt begins for a killer.

Anyone with information is encouraged to call Crime Stoppers on 1800 333 000 or report anonymously online.