Do you believe our former pets come back as ghosts?

Someone was trying to break into our house recently while my parents and I were gone on a family trip. This is going to sound crazy but this is what happened:

He got arrested shortly and claimed to have been growled and chased by a grey pitbull with white spots. He got super scared, got out of there fast but then the dog disappeared. The only problem is no one in my neighborhood knows nor owns any pitbull at all. Secondly, his description of what he saw fit my former friend. She (Cindy was her name) was a female grey pitbull whom died in my arms when I was 4. She had terminal cancer and was very close to me.

All I know is if this happened, well then he deserved it. Do you believe our beloved pets can come back as ghosts?

Do you believe our former pets come back as ghosts?
Post Opinion