SELLS, Ariz. (AP) — A tribal police department has arrested an Arizona woman who they say was driving drunk when her car collided with the vehicle of a Border Patrol agent, killing him.

Tohono O'odham police are charging 40-year-old Angela Mata of Sells with negligent homicide, criminal damage and driving under the influence, and say federal charges are pending.

Police say Mata was driving on a dirt road on the southern Arizona reservation near the village of Topawa and failed to yield to the agent's vehicle as she approached Federal Route 19.

Her car hit the agent's car, causing it to roll off the road. The agent was pronounced dead at the scene.

The victim has been identified as 32-year-old Michael Gallagher, who worked for the Border Patrol for 3 years. He leaves behind a wife and two kids.

Mata had non-life-threatening injuries and is in custody after failing field-sobriety tests.