When a 13-year-old boy found out a deep, dark secret about his father via some compromising photos, the dad was completely humiliated -- so he murdered his own kid, or at least that's what the victim's brother said.

Mark Redwine was arrested in Washington State on July 22 for the 2012 death of his son, Dylan, reports KMGH. He is set to attend an extradition hearing on August 17 to determine where he will answer to the felony charges of second-degree murder and child abuse resulting in death that he faces. The suspect reportedly intends to fight the extradition.

In the event that he does so, the attorney's office is preparing to fight back with a governor's warrant intended to demonstrate probable cause, notes The Durango Herald.

Mark is being held on $1 million cash bail.

"We didn't know what the outcome would be, but we've always known that Mark was in some way, shape or form involved in this," Dylan's brother, Cory, told KMGH.

Cory said that he believes that his father has a terrible temper and may be mentally ill.

"He's just a sick person, but he’s fully aware of his actions, and he's fine with being that person," he added. "If that's how he wants to live his life, then well, we can see where that gets you. He's where he belongs."

The photos were "disturbing," Cory said, and he knew that Dylan was planning to confront Mark about them.

"I have seen the photos," explained Cory. "It shows him wearing women's clothes and makeup and a diaper and then eating his feces from the diaper. It was disgusting. We couldn't believe it."

Cory said that Dylan likely had more compromising information about his father "than just pictures," though nobody besides Mark know exactly what allegedly set him off.

Dylan's skull and some of his remains were found 1.5 miles away from each other near mountains that Mark was familiar with, reports KUSA. Though Mark said that his son had been kidnapped, Cory told investigators that his father made multiple comments in 2013 about the boy dying from blunt force trauma but remarked that officials would have to find his skull to learn the truth. He also reportedly once told his the boys' mother that if he were to hide a body, it would be in the mountains.

Mark and his ex, Elaine Hall, were in the midst of a nasty divorce when the incident occurred, and Cory and Dylan did not get along with their father.