Clay County detectives have arrested Candice Mullis and Justin Stone on charges they provided fraudulent registration and shot records for at least seven dogs for a total of $1,900.

Some of the dogs became ill shortly after being purchased through ads on Craigslist. The Sheriff's Office says some dogs died and others required expensive life-saving medical treatment.

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One Ponte Vedra couple paid $6,000 in veterinary bills on a dog named Bella (pictured, below) they bought from Mullis and Stone.  In the end, the dog still had to be put down.

It is unclear where exactly the sick puppies were raised or if a "puppy mill" type operation was involved.

Anyone else who purchased a dog from the couple is encouraged to contact the Sheriff's Office.

Stone, 23, and Mullis, 24, of Middleburg, Florida were arrested Monday and charged with organized schemes to defraud.