86-year-old Walter James Mason was arrested earlier in October in Eastland County, Texas in connection with a murder that happened in 1980 in the state of Idaho, almost 1,500 miles away.

Mason was living under the alias of Walter James Allison when he was discovered after deputies in Eastland County in central Texas used fingerprinting to identify him, according to CNN.

Mason's arrest is in connection with the death of Daniel Mason Woolley, who was fatally shot in September 1980 outside a bar in Clayton, Idaho.

Mason was a prime suspect in the incident but the local police force and the FBI were unable to track him down at the time, according to a police news release cited by local Texas newspaper Abilene Reporter-News.

Mason has pleaded not guilty, according to numerous local outlets and CNN.

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An 86-year-old man was arrested in Eastland County, Texas in connection with the death of a man that happened nearly four decades ago, almost 1,500 miles away in Idaho.

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Walter James Mason was arrested in connection with the death of Daniel Mason Woolley, who was fatally shot in September 1980 outside a bar in Clayton, Idaho, according to a press release from the sheriff's office in Custer County, Idaho, where the shooting took place.

The release was cited by local Texas newspaper the Abilene Reporter-News.

Mason was a prime suspect in the killing at the time, and the Custer County Sheriff's office and the FBI attempted to track him down, but were unable to do so, according to CNN.

Mason was living under the alias of Walter James Allison when he was discovered this month using fingerprint matching by deputies at the Eastland County Sheriff's in central Texas, the Associated Press reported.

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Mason was arrested by police in central Texas in connection with a murder in Clayton, Idaho in 1980. Google Maps

Two members of the Custer County Sheriff's Office were then called in to transport Mason back to Idaho, where he is being held in a secure detention facility and awaiting trial for first degree murder, according to CNN.

He has pleaded not guilty of the crime, The Idaho Falls Post Register and CNN reported.

The Idaho Falls Post Register said that Mason is in "poor health."