Ian Baunach (left) was taken into custody in the murder of his ex-wife Katie Baunach (Pictures: Facebook/Ian Baunach)

A bodybuilder allegedly killed his ex-wife when she went to his house to pick up her belongings and incinerated her after retrieving her engagement and wedding rings.

Ian Christopher Baunach, 43, on Monday pleaded not guilty to killing Katie Baunach, 39, who is the mother of their two children.

The ex-Marine was arrested in November 2021 and charged with domestic battery by strangulation, but released later the same day on a $25,000 bond.

In September, 10 months after Ian’s arrest, Katie accused him of abusing one of their kids and obtained a restraining order against him.

Ian Baunach was arrested after police found blood stains in his home and his ex-wife’s car parked outside (Picture: Facebook/Ian Baunach)

Katie left their two kids with a friend on September 29 and said her ex-husband had allowed her to go to his home to take back some of her ‘personal items’. She did not return.

The following day, police went to Ian’s house in LaBelle, which is about 30 miles east of Fort Myers in Florida, and found Katie’s car outside. However, Ian was not inside the residence. Cops later found Katie’s car was no longer parked outside the home.

Police obtained a search warrant because Ian would not let them inside. When they got in, they saw blood stains which he said were from grocery items.

They broke into a safe and recovered an AR-15 upper receiver and 13 silencers – and Katie’s engagement and wedding bands.

Katie Baunach was the mother of the couple’s two children (Picture: Facebook/Ian Baunach)

Cops also found a .40 caliber pistol on a bookshelf, a shotgun and three rifles in the attic.

Outside, they discovered human remains, including ‘the fragment of a human mandible with an intact tooth in a fresh burn pile’, court documents state.

A blue 50-gallon barrel contained ‘additional human bone fragment’ and ‘law enforcement discovered other suspected human bone fragments in the area surrounding the burn pile’, according to the document.

Ian, who carried another .40 caliber pistol on him, admitted to getting in a fight with Katie ‘over another woman’ and being ‘angry’ that she was granted a domestic violence injunction against him.

Ian Baunach pleaded not guilty to murdering his ex-wife Katie (Picture: Facebook/Ian Baunach)

But he denied murdering Katie and said she had vanished and there was no one there.

Ian was arrested and charged with first-degree pre-meditated murder, cremating a dead body 48 hours after death and destruction/concealment of physical evidence.

He could face the death penalty or life in prison if convicted.

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Ian Baunach allegedly incinerated his ex-wife after taking back her engagement and wedding rings.