MIAMI BEACH -- The search is on for a missing baby from Arizona after her mother was arrested in South Florida.
Elizabeth Johnson, 23, of Tempe, Ariz., was taken into custody Wednesday by Miami Beach police.
Authorities said Johnson disappeared with her 8-month-old son, Gabriel, on Dec. 18 -- but the boy remains nowhere to be found.
Officials said they were concerned, because Johnson reportedly made threats to harm the boy in the past.
Investigators said believe Johnson was in San Antonio, Texas, for the holidays, but she has yet to reveal the whereabouts of her baby.
Comment On This Story