The Globe reports.

State Police issued a statement:

Trooper Walsh was arrested by Boston Police last night at his home on South Munroe Terrace in Dorchester and charged with assault with a dangerous weapon, illegal discharge of a firearm, operating under the influence, and leaving scene of an accident causing property damage. The Department of State Police condemns the actions alleged.

The weapon allegedly brandished by the trooper was not his Department-issued weapon. That service-issued gun was turned in to the Department when the trooper was granted military leave approximately five years ago.

Trooper Walsh is an 18-year veteran of the State Police. For approximately the last five years, he has been on military leave. We do not have specific details about his military service at this time.

The Department will monitor the criminal case as it proceeds through the judicial system. Additionally, the Department will hold a duty status hearing this week to determine the trooper's status as a member of the State Police.

We are grateful beyond words that no one -- not the Boston Police officers, not an innocent bystander, and not Trooper Walsh -- was injured -- or worse -- by gunfire. We thank the Boston Police for the professionalism and restraint with which they handled this incident.