Investigators are searching for a missing 21-year-old Arizona woman, who was last seen leaving a friend's home and never arrived for her work shift the next day, according to officials. Isabella Comas disappeared under "suspicious circumstances" on Sunday, January 11, the Avondale Police Department confirmed in an emailed statement to Us Weekly. Comas left her friend's home in Avondale that afternoon, around 3:00 p.m., while driving a red Hyundai Sonata, according to a news release shared by police on Wednesday, January 14. She "has not been seen or heard from since," police said.