Ed Geary, Deputy Director of External Affairs at the Suffolk County Sheriff's Office in Massachusetts confirms Markoff was pronounced dead by medics at 10:17 a.m. Eastern on Sunday.
Markoff was being held at the Nashua Street Jail in Boston.
A statement released by Boston Police Commissioner Edward Davis and Suffolk County District Attorney Daniel F. Conley said the suspect "was alone in his cell and all evidence collected thus far indicates that he took his own life." No details on how he took his own life have been disclosed yet.
