The Alaska serial killer who reportedly killed 11 people according to the FBI may have killed more while abroad. Israel Keyes, a former member of the Army and a contractor, studied the lives of other serial killers, sources say. Authorities told reporters that they are gathering more information on whether Keyes killed more people than he admitted to killing.

Keyes committed suicide December and left a four-page note about the slayings. Police say Keyes expressed no remorse.

Those who are involved in the investigation said Keyes had "a meticulous and organized approach to his crimes" and that he stashed weapons, cash, and other items he used to dispose of the remains of the people he killed.

In his note -his last thoughts- found in his jail cell, Keyes wrote, "Speak soft in your ear so you know that it's true. You may have been free, you loved living your lie, fate had its own scheme, crushed like a bug you still die."

While the blood-soaked and rather extensive note does not reveal any new details about other killings but it does give those who read the breadth of it a glimpse of the serial killer's mind.

"I looked in your eyes, they were so dark, warm and trusting as though you had not a worry or care. The more guiless (sp) the gaze the better potential to fill up those pools with your fear," Keyes wrote.

"Your wet lips were a promise of a secret unspoke. Nervous laugh it burst like a pulse of blood from your throat. There will be no more laughter here," the killer also wrote.

On the last page of his last writing, Keyes wrote, "Okay, all is over, words are flaccid and weak. Back it with action or it all comes off as cheap. Watch close while I work now, feel the electric of my touch, open my trembling flower, or your petals I'll crush."