At the time, he was already in custody on federal firearms charges after investigators searched his Bridgeport home. Those charges have since been dropped following Wednesday's appearance in Bridgeport Superior Court.
Court documents suggest that his parents had become distraught over Kyle Navin's drug use and that the relationship between he and his father had become strained.
Kyle Navin's lawyer said during a previous court appearance that his client was hooked on drugs and had a $300 to $600 per day heroin habit.
The couple, originally from Easton, disappeared on Aug. 4.
Their vehicle was found abandoned in a commuter lot off of the Merritt Parkway in Westport later that month.
State police said they were eventually led to the abandoned home in Westport. That's where they discovered the couple's remains.
Troopers said Kyle Navin's girlfriend, Jennifer Valiante, was also arrested as an accomplice.
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