The husband of a fitness instructor who was murdered in a Dallas church last month said Tuesday that he’s willing to forgive the perpetrator – but only if the killer surrenders to police.

Police said the body of 45-year-old Missy Bevers turned up inside the Creekside Church of Christ in Midlothian early in the morning of April 18. They said surveillance video shows the killer dressed in police tactical gear, including a helmet, making it hard for investigators to identify exactly who it was.

"Turn yourself in. Do what's right. Don't live the rest of your life with this in your heart because it will eat you like cancer," Bevers' husband, Brandon, told Fox 4. "We need closure. This is going to eat us alive for many years to come."

Detectives announced last week they were looking for a light-colored Nissan Altima seen near the crime scene. They described it as a "vehicle of interest."

Police said they were not considering any immediate relatives, friends or colleagues of the fitness instructor as suspects. Earlier this month, investigators revealed that she and her husband had been struggling with their marriage and finances, and that both had exchanged flirty messages with other people.

"Most people in society don't have their baggage strewn out in public like this. But the problems we encountered, I would say 80 percent of society deals with the same problems,” Brandon Bevers responded.

He also said he was struggling to figure out who could have killed his wife. "I don't know if it's business related or some kind of jealousy... I've pretty much exhausted every scenario and every avenue that I can think of, of who could have done this."

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