HAVERHILL, Massachusetts - July 15, 2010 - Two police officers are facing charges after an off-duty fracas outside a Massachusetts home ended with one officer using a Taser on the other.

Daron Fraser lives in Raymond, New Hampshire, and is a patrolman in Lawrence, Massachusetts. Joshua Wallar, of Methuen, Massachusetts is a patrolman in Kingston, New Hampshire.

Authorities say Fraser and his pregnant girlfriend were having a dispute late Tuesday night in Haverhill (HAY'-vruhl), when Wallar intervened and subdued Fraser with his department-issued Taser.

Fraser was charged with two assault counts. Wallar was charged with assault and battery with a dangerous weapon. Both pleaded not guilty.

Wallar's lawyer says his client believed his intervention was justified. Fraser's lawyer says the dispute was overblown.