'Prison saved my life... now I'm starting college' says mum of three Carrie Keegan

Carrie Keegan starting drinking at the age of nine and taking drugs when she was 12.

"Prison saved my life," says Carrie Keegan.

Maybe it's a measure of just how chaotic her life had become that an 11-month jail term marked a change in how the 39-year-old was living.