The barrister Noël Sweeney writes in Criminal Law & Justice Weekly:

 Monitoring animal abusers could prevent them harming people in the future…

…Many criminals who are animal abusers go on to commit serious offences of violence towards vulnerable human victims. There is a defined connection between cruelty to animals and violence towards children and women. It is well documented that mass murderers like Jeffrey Dahmer and Theodore Bundy tend to share a long history of animal cruelty…

http://www.criminallawandjustice.co.uk/features/Why-We-Need-Animal-Abuser-Registry

This United States organisation also does excellent work on this important subject:

http://nationallinkcoalition.org/