The 16-year-old defendant “presents a danger to himself and to others that no curfew, monitor, or custodial placement can be trusted to contain,” the judge wrote.

The 16-year-old suspect was ordered to report to the federal courthouse in Tampa earlier Monday morning, where his family would deliver him to the U.S. Marshals' custody.

A teenager charged with sexually assaulting and killing his 18-year-old stepsister on a Carnival Cruise ship has surrendered after a federal judge reversed his decision on…