Anyone know the name of this horror novel?

[Tandy]

I have spent hours googling trying to find this book, but no luck. I read it about 15 years ago when I was living in Canada (it might be a Canadian book?).

It's about a husband and wife who murder a little girl in order to get inheritance money. The little girl is a sister of either the husband or wife, but I can't remember which. The couple bury the girl after they murder her, but she comes back and haunts them as revenge.

The little girl (maybe around age 8-12) is really evil when she comes back, and she makes the couple do crazy and disturbing things. For example, the husband (I think his name was Jeff) is found ripping apart the family dog and eating it.

I think the cover of the book has a picture of a creepy little girl covered in dirt (since she was buried after she was murdered).

Does this sound familiar to anyone??

Thanks!! :)