FRISCO, TEXAS (NBC) - Police in Frisco, Texas, say they've detained a 16-year-old boy in the shootings of his own parents.
He's now being charged as a juvenile with murder.
Right now, the big question is what happened inside the family's house - and why.
After hours of searching for clues inside, investigators carried out bags of evidence, but remain tight-lipped about a possible motive.
Why would a 16-year-old boy kill his own parents?
Police got a call from neighbors who heard gunshots about 2:00 am Monday, when officers arrived, they found Ryan and Maria Elena Callens dead inside their home.
Their 16-year-old son, the youngest of five children, was taken into custody. NBC 5 is not identifying him because of his age.
Police say one of his siblings was also home at the time but wasn't hurt.
Ryan Callens owned his own company, called the Callens Innovation Group.
Neighbors say his wife home schooled their son, who is now suspected of killing them.
Friends say his parents were strict with him on things like internet access and violent movies.
For now, neighbors are both stunned and stumped - struggling to explain what led to the murders.
The 16-year-old son is in the Collin County Juvenile Detention Center, charged with two counts of murder.
He was scheduled for a hearing Tuesday morning.