Dzhokhar Tsarnaev, suspected of bombing the Boston Marathon with his older brother, Tamerlan Tsarnaev, was questioned for 16 hours by authorities before being read his Miranda rights, the AP reports today.

Tsarnaev, a 19-year-old college student, confessed his role in the crime during the questioning in his hospital room, but that confession may not be admissible in court. Once he was advised of his right to seek counsel and remain silent by a representative from the U.S. attorney's office, the suspect stopped talking.