RYE - More than six years after Eugene Palmer went on the run after allegedly killing his daughter-in-law, he is now officially a top target of the FBI.

FBI officials announced today at at their Rye office that Palmer, now 80, has been added to the agency's Ten Most Wanted Fugitive List.

Palmer faces a murder charge in the death of Tammy Palmer, who was gunned down on Sept. 24, 2012, at the family's Haverstraw property. The FBI is offering a reward of up to $100,000 for information directly leading to the arrest of Palmer.

"That is a life-changing amount of money to a lot of people," William F. Sweeney, assistant director-in-charge of the FBI's New York office, said at a news conference today. "Eugene Palmer might be thinking we've given up on finding him, but he'd be wise to think again. This is as good a time as any to remind him that the team up here plays by a different set of rules. In our eyes, the victim always comes first, and this team will never give up until justice is served."

Palmer was added to the fugitive list now, after nearly seven years, because of recent leads and vacancies on the list, Sweeney said. Authorities did not elaborate on those leads, but said that Palmer might be in Florida or upstate New York, specifically the Adirondacks, where he has relatives.

Palmer is the 523rd person added to the fugitive list, and the FBI has about a 93% success rate tracking down suspects on that list, Sweeney said.

Palmer faces a murder charge in Rockland County, and there is a federal warrant for him for unlawful flight to avoid prosecution.

Palmer's property on Willow Grove Road backs up into Harriman State Park, where his truck was later found and where he is believed to have fled. The outdoorsman was a frequent hunter, fisher, trapper and hiker who knew the 47,527-acre park well.

Palmer's relatives have said that they think Palmer, who depended on medications for diabetes and a heart condition, died in the woods. Authorities have said that if Palmer had died in Harriman, his body would have been found.

Sweeney said today that authorities believe Palmer is alive because of a "general sense" of Palmer's personality and capabilities. Authorities consider Palmer to be armed and dangerous, he said, and it's possible Palmer has been receiving help to evade capture.

In November the FBI announced a reward of $20,000 for information on Palmer's whereabouts, and Haverstraw and the U.S. Marshals Service had previously put up rewards of $5,000 each in the case.

Fatal shooting

Tammy Palmer lived in a house, which was owned by her father-in-law, with her husband, John, and their two children. The couple had been having marital problems, and Tammy Palmer had filed a restraining order against her husband. Eugene Palmer became enraged that his son was banned from the family compound.

Rockland County District Attorney Kevin Gilleece said today that Tammy Palmer walked her children to the school bus stop the morning of Sept. 24, 2012, walked back to her house, and was killed by shotgun blasts from Eugene Palmer.

"We have never stopped searching for Eugene Palmer," Gilleece said. "Law enforcement will never stop searching for him."

Haverstraw Police Chief Peter Murphy called it "a heinous crime."

He said authorities are hoping to provide "some closure and justice to Tammy's family."

The FBI said Eugene Palmer is a known car enthusiast and fan of auto racing, and he has a noticeable deformity on his left thumb. Palmer also has medical issues that could make him a frequent visitor to doctors offices and health care facilities, the FBI said.

Anyone with information on Palmer's whereabouts can call the FBI at 212-384-1000 or Haverstraw police at 845-354-1500.

REWARDS: Authorities offer up to $30K in search for Eugene Palmer

EUGENE PALMER: Years later, Haverstraw detectives stay with hunt

HAVERSTRAW KILLING: Police believe Eugene Palmer is alive

Twitter: @MattSpillane