The car won't start unless u jump the battery n the anti theft light appears

What is your question?

Every time I shut off car I have to jump battery n the anti theft light comes on but will start with a jump the battery is good I had to break in to my car through the trunk n ever since this is how I have to start my car

What makes this problem better or worse?

It starts with a jump

How long has your 2003 Cadillac DeVille had this problem?

About 8 months