Woman, 21, accused of killing Border Patrol agent in shooting linked to California stabbing appears in court - Teresa Youngblut faces federal firearms charges in the January 20 death of Agent David Ma

The killings of a Border Patrol agent in Vermont last week, a state’s witness in California, and a pair of senior citizens in Pennsylvania all appear to be linked to a fringe group of West Coast vegan activists and artificial intelligence theorists.

The fatal shooting of a U.S. border patrol agent in Vermont and a murder in Northern California appear to be related.

Michelle Zajko, 32, supplied the gun that killed US Border Patrol agent David Maland last week -- and may be tied to two other homicides in California and Pennsylvania, federal authorities said.

Maximilian Snyder, who has been charged with killing a California landlord, applied for a marriage license last year with Teresa Youngblut, who has been charged in connection with the fatal shooting last week of a border patrol agent in Vermont.

A Washington state woman has been ordered to be held without bail in connection with the death of a U.S. Border Patrol agent in Vermont.

The California suspect was listed on a marriage application with a woman accused of killing a Border Patrol agent. They attended Seattle's Lakeside School.

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.

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.

The woman accused of killing U.S. Border Agent David Maland allegedly used a gun bought by someone who was a person of interest in a double murder, prosecutors said.

Investigators are exploring whether two apparently unrelated murders could be linked, by way of an alleged cult made up of highly educated computer scientists with an interest in animal rights, Andrea

Teresa Youngblut was ordered held without bail in connection with the death of U.S. Border Patrol agent David Maland in a case that has grown to encompass killings in multiple states.