A Detroit hit-man will spend the next several years behind bars after agreeing to murdering a federal grand jury witness. Back in June of 2009, 46-year-old Michael Keller agreed to kill the witness and accepted $800 dollars and a few cartons of cigarettes from an undercover agent.   

In his plea agreement, Keller admitted to taking the payment — but denied that he intended to go through with the killing.

Keller pleaded guilty to eight counts of second-degree murder and one gun charge.  He is sentenced to 14 year in prison.

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