An Alaska serial killer may be dead, but that doesn't mean he will soon be forgotten. Authorities are still trying to piece together just how violent Israel Keyes' path of destruction was before he eventually committed suicide in jail.

Keyes is believed to have killed at least eleven people during his rampage, and before his death he had admitted to another seven. He blazed a path across the United States that very well could have included murders spanning from Vermont to Washington and up to Alaska. On top of that, his movements weren't even restricted to just the United States.

"Keyes traveled internationally and it is unknown if he committed any homicides while outside of the United States," noted an FBI statement.

That, unfortunately, makes it a lot harder for police to reach a resolution in the case, as the number of potential murders that could be attributed to Keyes is still very high. The FBI has already stated that they are doing eveything they can to provide closure to families that may have been affected by Keyes' actions.

"If we have a missing person identified in a particular area, we work closely with that local police department to either connect the person to Keyes or not," Jolene Goeden, FBI special agent in Anchorage. "We have his DNA."

On Tuesday the FBI released a detailed interactive timeline of Keyes' travels, spanning all the way back to 1997. It is their hope that people will see the map and clue in on any mysterious murders that happened in their area around that time.

Keyes lived in Neah Bay, Wash. after he was discharged from the Army in 2001, and it was there that he committed what may have been his first homicide. In 2007 he moved to Anchorage, Ak., which he would use as his base of operations while committing murders and robberies across the nation.

In a suicide note that he left behind in his cell, Keyes showed no remorse for his actions, and appeared to romanticize death. He was also extremely critical of modern society in many of his writings. Keyes killed himself nine months after his arrest for the slaying of the Alaska coffee barista Samantha Koenig.

"Soon now, you'll join those ranks of dead, or you're ashes the wind will soon blow. Family and friends will shed a few tears, pretend it's off to heaven you go. But the reality is you were just bones and meat, and with your brain died also your soul," Keyes wrote in his suicide note.