A failed marriage that ended with a brutal, calculated double-murder. A suspect with more than a decade of purported military training. Failed manhunts that have extended as far as Greece, Turkey and Hungary. A trail of evidence that grows colder by the day.

The FBI's dossier on Alvin Scott — born Ahmet Sehsuvar — reads like a supermarket-rack crime novel, complete with fake passports, premeditated violence and a ruthless murder suspect who has eluded authorities at every pass.

Scott, 58, is wanted for the murder of his estranged wife, Bulgarian-born Lillia Ivanova, and her male companion in the Buckhead section of Atlanta on Aug. 3, 2001. Both Ivanova, 38, and Elie Abi-Saab, 48, were shot in the chest and head.

"Scott ran down both of the victims, shooting each three times after stalking them outside an apartment," FBI Special Agent Stephen Emmett told FOXNews.com. "Some would be rushing to call this a crime of passion, but this is not. It was a crime of premeditation, stalking, lying in wait, and it was just so over the top."

"If he can't have her, no one can," FBI Special Agent Chad Fitzgerald wrote to FOXNews.com. "He was very distraught over the pending divorce."

Scott and Ivanova had a hearing scheduled in connection to their divorce proceedings on the day of the murders. Neither party attended the proceeding, Fitzgerald said.

FBI officials believe Ivanova and Abi-Saab were "just friends," according to one investigator. But roughly a month after separating from Scott, Ivanova and Abi-Saab were shot at point-blank range as they exited Abi-Saab's Roswell Road apartment, where Ivanova had been staying to "get away from Scott and his stalking," according to Fitzgerald.

Emmett described the slayings as "very vicious" a factor he believes will be weighed considerably when FBI officials consider the case for its Ten Most Wanted Fugitives list. The minimum reward for information leading directly to the arrest of a Top Ten fugitive is $100,000, an amount Emmett hopes will establish new leads in the case.

"We suspect him to have multiple identities and multiple passports," Emmett said. "And we don't have a good grasp of his travel."

Regarding Scott's potential whereabouts, Emmett said, "The answer, in short, is we just don't know."

Emmett said efforts to capture Scott have extended to Greece, Hungary and his native Turkey, where authorities believe he may have returned, using a U.S. passport after initially fleeing to New York following the slayings. Scott is currently listed as an international fugitive with Interpol authorities, Emmett said.

Fitzgerald said Scott has "been very difficult to locate," in part because of his purported extensive military background. According to information written by Scott and found by FBI officials, he claimed to be in the Turkish military from 1972 to 1986, including 11 years in its investigative branch. Scott also claims to be a firearms expert, a fifth-degree black belt in Tae Kwon Do and speaks English, Turkish and Bulgarian fluently, Fitzgerald said.

Scott has been employed as a journalist and considers himself an Eastern Bloc expert. He also told associates he worked as a staff member in the Turkish prime minister's office in Ankara and the Turkish Consulate in Plovdiv, Bulgaria, where he met Ivanova, Fitzgerald said. The couple married in 1988.

"We think with his background — he was in the military in Turkey — that he's gone overseas and has been overseas, which makes it that much more difficult," Fitzgerald said. "And we believe he claims to have been a spy for an organization like the CIA in Turkey. We think he's obviously well-trained."

Scott also held a private investigator's license in Atlanta, although he was not practicing at the time of the slayings, Fitzgerald said. His background is unquestionably aiding his ability to avoid arrest.

"He's gotten to see a little bit more of the world," Fitzgerald told FOXNews.com. "And he's basically been able to lay low under the radar."

Fitzgerald said the last sighting of Scott occurred in 2004, when a tipster recognized him as someone they knew in Bulgaria. FBI officials worked with the Bulgarian authorities, but they were unable to apprehend Scott.

"We haven't had anything real solid in a while," Fitzgerald said. "We could never substantiate [the sighting], but we felt it was good."

FBI officials continue to develop leads through Scott's family and associates overseas, as well as anyone connected to him in the United States. Emmett said Scott's family, many of whom live overseas, have not been forthcoming with information.

Scott is considered armed, dangerous, and "very well-versed" in using a firearm, Fitzgerald said. He should also be considered a suicide risk. Scott — who changed his name from Ahmet Sehsuvar upon immigrating to the United States — is described as 6 feet tall, weighing 170 pounds, with brown eyes and gray hair. He has no known prominent scars, according to FBI officials.

Seven years into the search for Scott, Fitzgerald said investigators are not becoming frustrated.

"We'll never give up," he said. "I got a lot of years until I retire. And when I'm done with this, someone else will pick it up. You go long stretches without a tip, but then something comes along. We're hoping with your help, and the public's help, that that's what will happen here."

Click here to read more on the FBI's Most Wanted Fugitives.