At Billerica’s last working farm, a battle over $300,000 in unpaid taxes divides the town

To hear Billy Griggs tell it, his property — 25 acres of farm land on the edge of the Concord River — is over-assessed and overtaxed. But his decision to stop paying property taxes has residents split. Some think Billerica should cut the 73-year-old some slack. Others say it's only fair that Griggs pay up like everybody else.