[TexasCajun]

A police report states that a man stabbed the pit bull, Clara, after it slipped out of its collar and began tugging on the ear of his dog, a Westie Terrier.

[KirbDog]

A police report states that a man stabbed the pit bull, Clara, after it slipped out of its collar and began tugging on the ear of his dog, a Westie Terrier.

Yep now we just need the definition of "tugging". I expect it isn't what you or I might consider tugging.