Another common indicator of possible serial killing behavior is killing or intentionally harming animals. They may provoke, torture, or even kill cats, dogs, and other animals. Even after seeing the results of their actions, the person will show no form of regret or remorse. Serial killers generally seek control over the life of another, and at a younger age a small animal easiest to fully dominate.
https://www.crimemuseum.org/crime-library/serial-killers/early-signs
Oh yes. I have heard that association.
Yup