State police are offering a $25,000 reward for information leading to the arrest and conviction of the person or persons responsible for the murder of a Groton man nearly six years ago.

Anthony Hamlin, 40, was found murdered in a vacant field off Shewville Road in Ledyard around 8:30 a.m. on January 28, 2006. Police said Gov. Dannel P. Malloy has authorized the reward.

Family members said at the time that Hamlin, an Eastern Pequot who died of blunt trauma to the head, was supposed to board a train the night before his murder. He was moving to Hampton, Va., for a job, his mother Darlene Hamilton said.

“The investigators are here every day,” she said just days after the murder. “They're supporting us and trying to find out who would do such a horrible, horrible thing. We don't know who would do such a terrible and degrading thing.”

Police ask anyone with information about the crime to call the state Eastern District Major Crime Squad at (860) 886-6603 or the New London County State’s Attorney at (86) 443-2835. Calls may be anonymous, police said.