PORTLAND – A Greene man could spend the rest of his life in prison after he pleaded guilty Wednesday to charges that he robbed five banks in Lewiston, Auburn and Lisbon over a period of nearly four months.

David Bolduc, 45, admitted in federal court Wednesday that he robbed five banks in and around the Twin Cities between Nov. 27, 2005, and March 20, 2006.

Each of the five counts against Bolduc, who lived at 176 Hillside Estates in Greene, carries a sentence of up to 20 years in federal prison.

Police and prosecutors said Bolduc went on the robbery spree to pay his general expenses and to support a drug habit.

“Bolduc claimed he needed money to pay for his monthly expenses and to finance his marijuana and crack cocaine addictions,” according to an affidavit filed in U.S. District Court in Portland.

The affidavit also states that Bolduc told Auburn police a notebook used to write notes for all of the robberies and clothes he had worn while committing the crimes could be found at his Greene home.

Bolduc was arrested at gunpoint in March after he allegedly stole $147.39 from the Androscoggin Savings Bank on Turner Street in Auburn.

According to the affidavit, the Androscoggin Savings Bank was one of several banks staked out by police and the FBI the day Bolduc was caught. The document states Detective Chad Syphers of the Auburn Police Department saw a beige Ford Contour drive into the parking lot of the Androscoggin Savings Bank just before 9 a.m. and recognized the car as one described to have been used at a Lisbon bank robbery earlier in 2006.

Syphers allowed Bolduc to enter the bank and called for backup while the man was inside. According to the affidavit, Bolduc emerged a minute later and “was looking down at the ground and walking hastily to his vehicle.” He allegedly got into the Ford Contour and drove quickly out of the bank lot, failing to stop at a stop sign before heading into the nearby Wal-Mart parking lot, where he was arrested.

The affidavit states that while Bolduc was patted down after his arrest, police found a roll of coins and a handwritten note in his pocket that read, “EMPTY THE DRAWER. NO ALARMS! I’M ARMED!”

According to the affidavit, Bolduc told the detective he committed the robbery that morning because he had run out of money. Records at the Cumberland County Jail in Portland showed Bolduc was unemployed, disabled and divorced when he was arrested.

Bolduc could also be fined up to $250,000 after pleading guilty to the robberies. No sentencing date has been set.