No stuff that. Unless there is evidence, they can do one.
I know someone who had a woman claim that his dog attacked her dog, and bit off half of one of his ears (spaniel, so longish ears.) Turned out HER dog was running down the public pathway - off the lead - and got on his 2 back legs, and put his head over this guy's gate. His dog jumped up and ripped off half this woman's dog's ear (so she claims.)
She supposedly called out to see if someone would come out of the house - the front door was 20 feet from the gate. No-one went as no-one heard. (The guy I know said he never heard anything.)
She went to the vet with her dog, and ended up with a £1100 vet bill .. (Hadn't insured her dog - idiot!) and 3 days later, she came back to his house and demanded he pay the bill.
He told her to piss off. There was not a scrap of evidence that his dog did it, there was no noise/barking/shouting (that he heard,) on the night she claims it happened, and there was no blood or fur, or anything of that nature.
Also, as I said, she had her dog running loose on a public footpath, and he went up to the gate and peered over it, so it was 100% her fault, even if his dog DID attack her dog.
She took him to the small claims court, and lost. No evidence. she wasted MONTHS of energy on it, and money (for solicitors and court fees,) and she STILL had to pay the £1100 vet bill!
So stand your ground @Tututuna if there is no evidence, there is no case. I also second the idea of contacting the police, as this may be a scam in the making.