Oakland County Sheriff Michael Bouchard confirmed to reporters on Saturday that James, Jennifer, and Ethan Crumbley are "individually in isolation" in the same jail.
"They are segregated, each individually in isolation. We have advanced watch on them", Bouchard noted.
Earlier Saturday, authorities revealed that the Michigan couple was found in an art studio building in Detroit, Michigan, after local police received a tip. The Crumbleys were initially scheduled to appear in court for arraignment on Friday.
"We believe they were assisted in that location to get there, to get in. And we're gathering that information and we're going to have the totality of that done fairly soon", Bouchard said, noting that the conditions support the position that the couple was hiding from authorities.
"Given that they were hiding in a warehouse in Detroit, it certainly raises my eyebrows", the Oakland County Sheriff added.
He noted that additional charges may be levelled against the couple due to the manhunt.
The Crumbleys have pleaded not guilty to the involuntary manslaughter charges associated with their 15-year-old son Ethan's shooting attack, which killed four students and injured seven others.
Their son is facing 24 charges, including four counts of first-degree murder and one count of terrorism causing death.
According to Bouchard, police have gathered evidence leading them to believe Ethan was "looking forward to" Tuesday's shooting.
A judge in Oakland County has set James and Jennifer Crumbley's bond at $500,000 each.