Israel Keyes, the man accused with the kidnapping and resulting death of 18 year-old Samantha Koenig, was found dead Sunday morning, according to the Department of Corrections and Alaska State Troopers.
Keyes, 34, was awaiting a trial in March for the killing of Koenig, whose body was found in Matanuska Lake under the ice.
Karen Loeffler, the U.S. Attorney for Alaska, at a news conference Sunday afternoon said Keyes was found dead in his cell at the Anchorage Jail Sunday morning of an apparent suicide.
Troopers said "no foul play is suspected," and his body will be sent to the State Medical Examiner's office.
Now that he is dead, Loeffler said more questions about other crimes Keyes may have been involved with will be answered. FBI officials considered Keyes a serial killer and have linked him to deaths in other states, including four in Washington state, one in New York and the death of a Vermont couple.
"We've developed information that he was responsible for multiple additional victims. To our knowledge there are no other victims here in Alaska. They're all in the Lower 48," said FBI Special Agent Mary Rook.
"We do know he traveled extensively and he didn't always stay where he landed. He would land in one airport, rent a car and drive hundreds of miles."
Keyes confessed to killing Koenig after his arrest in March on federal access device charges, according to law enforcement.
During his questioning, Keyes also admitted to kidnapping and killing Bill and Lorraine Currier of Essex, Vermont. Investigators said they gathered a sufficient amount of information to corroborate that Keyes murdered the Curriers, however their bodies were not recovered.
Authorities in Vermont said they believed Keyes did not commit any other murders in that state based on their investigation.
Alaska authorities said it was necessary to keep much of its work secret to keep Keyes talking and last spoke with him Thursday - days before he killed himself.
The FBI said it consulted with its behavioral analysts in Quantico, Virginia to get insight into his personality.
"He was very, very sensitive to his reputation," Anchorage Police Chief Mark Mew said. "As odd as that sounds, we had to keep things extremely quiet in order to keep him talking with us."
The FBI said it was not able to recover the bodies of other victims, and that he was thorough in disposing the bodies, and that the timeline of the killings may have been in the last 10 years.
Joelene Goelden, Special Agent with the FBI, said Keyes was considered a serial killer and worked alone.
"Mr. Keyes never showed any remorse for his actions," Kevin Feldis, Assistant US Attorney, said.
Investigators said they will keep working the leads in hopes of bringing closure to families of the victims.
“It's important to note here that probably the families of the victims are the real ones that lose here,” Frank Russo, Assistant US Attorney, said. “They're never going to get the day in court where they see Mr. Keyes held responsible.”
Michelle Tasker, a spokeswoman for the Koenig family, said on Sunday that news of Keyes' apparent suicide was not the outcome they wanted. "We would've obviously liked for him to have gone in front of a jury of his peers and answer for what he's been accused of doing," said Tasker. "He did an injustice again to Samantha."
Editor's Note: Corrects information provided by Alaska State Troopers of when Isarel Keyes was found dead.
Contact Neil Torquiano