Anderson, 23, was last seen in Hudson, N.H. on Saturday, July 16 and was reported missing by her family the following day, prompting a multi-state investigation. On Tuesday, July 19, Anderson's body was discovered in Brattleboro, Vt. inside her blue 2017 Toyota Tacoma.
Several hours later, Vermont State Police announced that Anderson's ex-boyfriend, Matthew Davis, 34, of Fitchburg, was shot and killed by two troopers and a Brattleboro police officer after Davis lunged at investigators with a knife. Davis was a person of interest in Anderson's death.
The Vermont Chief Medical Examiner's Office performed an autopsy on Anderson Wednesday and determined she died from a gunshot wound to the head. Her death was ruled a homicide.
The Medical Examiner's Office also performed an autopsy on Davis and determined he died from multiple gunshot wounds. Officials have also considered his death a homicide.
Vermont State Police and other law enforcement agencies will continue the investigation into where and when Anderson was killed, and if she was abducted.