Joseph P. Green pleads guilty to charges of intimidation and conspiracy in a murder case.
Authorities say Austin Blaize offered to pay Green if he would beat up a witness testifying against Blaize when Green got out of jail.
Green could get up to four years on the intimidation charge when he is sentenced on January 9, but received no additional jail time for the conspiracy with Blaize.
Austin Blaize is accused of killing Terry Monier, the father of his ex-girlfriend, last January.
Blaize is facing life in prison with no chance of parole.