The FBI announced the arrest of a suspect Friday in the killing of U.S. Border Patrol Agent David "Chris" Maland near the Vermont-Canada border.

Here are four new details emerging in the bizarre and tragic shooting of U.S. Border Patrol Agent David "Chris" Maland in Vermont on Inauguration Day, including the killers' link to a "violent transgender commune.

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.

Officials said the agent was shot on Interstate 91, which was closed for several hours near the border with Canada.

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

A United States Border Patrol agent was shot and killed in Vermont on Monday, according to The Department of Homeland Security.

Associates of woman in Border Patrol agent's shooting death tied to other homicides in Pennsylvania and California.

A 21-year-old Washington state woman was arrested Friday for allegedly shooting a US Border Patrol agent to death in Vermont earlier in the week, according to federal authorities.

The woman charged in the death of a Border Patrol agent in northern Vermont was back in court on Thursday morning following her arrest last week. Teresa Youngblut appeared in U.S. District Court in Burlington for a detention hearing following her initial appearance earlier this week.

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

The Washington State woman, who authorities say was involved in a shootout that left two people dead, including a veteran U.S. Border Patrol Agent in Orleans County last