To not know whether to tell these parents re drugs and their daughter

[CrossroadsMotel]

Hello.
I run a small accommodation business and I was asked if I would allow a girl to hold a 21st birthday "gathering" there with a dozen or so of her friends.
I was very reluctant, for obvious reasons (most of our visitors are families and couples) but her parents offered a very hefty security deposit against breakages and she agreed no loud music or riotous behaviour. So they turned up this weekend.
Her parents also came down to drop her off, came in to see me to reassure me, and paid for the whole four-day holiday for all the kids. The parents seemed terribly nice, the birthday seemed a bit of a posh hippie.
Anyway, the stay went off OK, so I gave them back the deposit and then came clean-up time. In the kitchen on a shelf by the cooker we found a small freezer-type ziplock bag with a square of magazine paper inside it folded into an envelope. Inside that was about a teaspoonful of chunky off-white crystals.
We then had a frantic search down every side of sofa, under every rug, etc etc and found two loose white pills on the floor in the sitting room. Which may of course have been aspirin.
Do I complain to her, do I complain to her parents, do I call the police? Bearing in mind this is my business and livelihood and I really could do without it being publicised as a drug den. I'm obviously furious, but maybe I was being naive to think this wouldn't happen? Imagine if my next guests had found the drugs? Also - can anyone guess what the crystals were, I've never seen anything like it. Advice would be very welcome please, thanks everyone!

Do not tell the police. They will resent you for wasting their time with something so trivial and the story will be more likely to spread creating the bad reputation you are so keen to avoid.

Do not tell the parents. You have been paid and it's meddling. You're also more likely to spread the story. Keep it to yourself and flush it down the loo.

I have just come back from a festival where 50,000 of the countries youth, the majority under 25, were partaking of all manner of illegal substances... and LOVING IT.

Actually.... stick on some Ricardo Villalobos, have some of the stash and do something different for a change!

What porcamiseria said.

When you stay in privately owned B&Bs you occassionally get the feeling they are spying on you from behind the mirrors with cats bum mouths at the ready in case you use their nice towels to mop up the blood and cum or something.

This thread confirms it isn't just paranoia.

If you dont do a thorough clean every time a guest has vacated, how do you know whether the pills you found were not some sort of viagra that the respectable middle aged couple who stayed a while back lost, while they were humping each other around the room dressed up as the Krankies

Thank god for anonymous places like Holiday Inns...

I have to say this has slightly put me off independent accommodation providers! Not that I go for weekends away to engage in drug taking and illegal sex acts (these days!) but don't like the idea of the owner curtain twitching and running onto MN to discuss my leisure activities...