The Federal Bureau of Investigation has joined the multi-state manhunt for a Tennessee parolee who allegedly staged a bear attack in an attempt to cover up a hiker's murder. 

Nicholas Wayne Hamlett pretended to be a man named Brandon Andrade when he dialed 911 around 11:34 p.m. on Oct. 24 and told police he was injured and trapped in a body of water after a bear chased him off a cliff while hiking in Hamilton County, the Monroe County Sheriff's Office wrote in a Facebook post. 

Authorities traced the call to an area near Tellico Plains, northeast of Chattanooga. There, they found a bloodied corpse with Andrade's ID. 

But an autopsy revealed that the dead man was not Andrade — authorities do not know who the deceased man is, law enforcement told WSB-TV Atlanta. 

2 BOYS, BOTH 12, KILLED ON HALLOWEEN HAYRIDES IN WARNING TO FAMILIES

Nicholas Wayne Hamlett, pictured in three photographs above, is wanted for first-degree murder out of Monroe County, Tennessee. He allegedly stole the identity of Brandon Andrade and claimed to be Andrade when he called 911 posing as a hiker who had been chased off a cliff by a bear.  (Monroe County Sheriff's Office)

Forensic experts are working to produce a sketch of the "John Doe" in hopes of identifying him. 

Police later learned that Andrade's ID had been stolen by Hamlett and used multiple times. Police believe Hamlett stole the ID to escape parole, then faked his death for an unknown reason, the New York Post reported. 

Hamlett, 45, used a fake name when police questioned him about his 911 call. Authorities believe he has abandoned his Tennessee home, and say that he also has connections in Alabama, Montana, Alaska, Kentucky and Florida, WHAS 11 reported. 

"The FBI is providing technical and investigative assistance to the state and local authorities. Since the matter is ongoing, there isn’t much that we can say specifically," a spokesperson with the agency's press office told Fox News Digital.

BYSTANDER SAID SUBURBAN JOGGER MURDER SUSPECT SMILED AT HER MOMENTS AFTER SLAYING

Nicholas Hamlett is suspected of murder in Tennessee. (Monroe County Sheriff's Office)

In 2009, Hamlett was arrested in Niceville, Florida after he lured a man into the woods in Alabama, according to WBS. 

Hamlett held the Alabama man at gunpoint and attempted to strike him with a baseball bat before burying him in the woods, AL.com reported. He used the name Joshua Jones when he reached out to that victim so "he could get some insurance," according to court documents reviewed by the outlet. 

MEDICAL STUDENT MURDERED BY EX-BOYFRIEND AT CANCER CHARITY WALK: POLICE

Tellico Plains in East Tennessee, in the region where Hamlett disappeared. (Amy Smotherman Burgess/Knoxville News Sentinel via USA TODAY NETWORK)

Hamlett was charged with attempted murder and kidnapping in 2012, but pleaded to the lesser offense of felony assault and was sentenced to 20 years in prison. He had four prior felony convictions, according to Alabama court records.

CLICK HERE TO GET THE FOX NEWS APP

Hamlett, who is wanted for first-degree murder in the unidentified man's death, is said to be 5'7" tall and weigh 170 pounds. He reportedly uses multiple aliases and may still be using Brandon Andrade's name. He is considered "armed and dangerous," police said.