The Hillsborough County Sheriff's Office says Julie Powers Schenecker was taken to jail late Sunday morning.
She was being treated for an unknown medical condition that existed before her arrest Friday.
She is scheduled to make her first court appearance Monday morning.
Authorities say Schenecker shot her son twice in the head in the family car because he was talking back as she drove him to soccer
They say Schenecker then drove to their upscale home and shot her daughter in the face inside the home.
Schenecker's husband is an Army officer who was working overseas
when the shootings happened.
(Copyright 2011 by The Associated Press. All Rights Reserved.)