(CBS) DURANGO, Colo. - The father of Dylan Redwine, a 13-year-old boy whose remains were found last week in southwest Colorado, says his ex-wife - Dylan's mother - is accusing him of killing their son, CBS Denver reports.
"I was standing outside and her vehicle passed by and turned around in the driveway in front of my house and as she was passing back by she muttered out the window, 'Murderer,' " Mark Redwine said of Elaine Redwine.
Police have not named any suspects or persons of interest in the case, but investigators are calling the death a homicide, according to the station.
Dylan went missing on Nov. 19, a day after arriving at his father's home in Vallecito, Colo. for a court-ordered visit. The boy had been living with his mother and brother, Cory, in the Colorado Springs area.
Mark Redwine said he returned home from running errands that afternoon to find Dylan was gone. His remains were found last week during a search of Middle Mountain Road, located north and within sight of Vallecito Lake, near his father's home.
Dylan's disappearance drew national attention, including an appearance by his parents on the "Dr. Phil" show. During the show, Elaine and Mark Redwine accused the each other of responsibility for their son's disappearance.
According to the station, prior to the couple's divorce, Elaine Redwine filed for a temporary restraining order in 2005, calling her husband a "credible threat" to the family's safety.
Since the discovery of Dylan's remains, Elaine Redwine is not the only person who has accused Mark Redwine of playing a role in the 13-year-old's death.
"I believe that Mark is, Mark is holding the key," Dylan's brother, Cory, 21, told the station. "We strongly believe that the last person to see Dylan knows the truth."
Investigators in La Plata County are working to determine how Dylan's remains ended up 10 miles from his father's home. They reportedly met with Mark Redwine on Friday although it is unclear what was discussed. According to the station, he says authorities have asked him to retrace the case facts with them on Tuesday.
Mark Redwine had maintained that he had nothing to do with his son's disappearance and offers his own theory on what happened.
"I've always believed that one of two things happened. When he walked out the front door he set out for a destination and never made it. Or I've always thought a vehicle pulled up in front of my house and he knew who it was and he got into a vehicle with somebody," Mark Redwine told the station.
He said he hopes he and his ex-wife can put aside their differences in order to give their son a proper resting place.
A vigil for Dylan was held Saturday evening.