Teresa Youngblut, 21, has been charged in the killing of Vermont-based Border Patrol Agent David Maland, which occurred on Monday.

New details regarding the fatal shooting of Minnesota-born U.S. Border Patrol agent David Maland have been revealed in court. The 44-year-old was fatally shot while conducting a traffic stop in Vermont on Jan.

A Washington state woman has been arrested in connection with the fatal shooting of a U.S. Border Patrol agent in Vermont on Monday.

The weapon that killed Agent David Maland last week in northern Vermont was bought by a person of interest in a double murder two years ago in Delaware County, state police say.

MANCHESTER, New Hampshire ( WMUR) -- Investigators said the guns allegedly used in the killing of a Border Patrol agent in Vermont were purchased in that state. Teresa Youngblut is facing two felony charges in connection with agent David Maland's death.

Teresa Youngblut, the woman charged in the shooting death of U.S. Border Patrol Agent David "Chris" Maland, has a detention hearing on Jan. 30.

Prosecutors say a Washington state woman charged in connection with the fatal shooting of a U.S. border patrol agent had been in frequent contact with someone whom authorities have linked to homicides in Pennsylvania.

A man accused of murder in California appears to have sought a marriage license with a woman charged in connection with the fatal shooting of a U.S. Border Patrol agent in Vermont

A woman charged in connection with the fatal shooting of a U.S. border patrol agent in Vermont had been in frequent contact with someone whom authorities have linked to homicides in Pennsylvania and California,

As the sprawling investigation unfolds, here’s an overview of the key figures involved and their alleged connections.

Federal prosecutors have filed a motion seeking to keep Teresa Youngblut in custody in Vermonth while she awaits trial on charges connected to the shooting death of a Border Patrol agent. WPTZ's Jackson Stoever reports.