A 21-year-old man was sentenced to 25 years in prison after he pleaded guilty to the 2012 murder of David Rhea, a commercial fisherman from Pinellas Park.
Randy White, originally charged with first-degree murder, pleaded guilty to second-degree murder last week.
Police said three men targeted Rhea, 39, because he was known to keep large amounts of cash.
The two others are awaiting trial.
One of them, Zachary Perrine, 23, already is serving a 30-year sentence; he pleaded guilty last week to committing an aggravated battery in the Pinellas County Jail, an incident that occurred after he was arrested on the murder charge.
The other, Cody Dials, 20, is scheduled to go on trial in December.
Just last month, attorneys announced that a detective found a gun believed to be the murder weapon. It was found after the discovery of a hand-drawn map that had Dials' fingerprints on it.