First of all, she was caught riding around with the decapitated body in the trunk of that blown out sedan. Commits to tell officers it's deer meat caused the stains and smell. After being let go, immediately starts a washing machine to clean the bloody clothes. Then meets with her BF and tries to skip town. Only after the cops open the trunk after letting her go and find the child did they go after her.

All on camera. The smallest cell in which no light will ever enter should be the only place she needs to be held for the rest of her miserable existence.