Fine by lending the PC?

I had my buddy borrowed my laptop for a essay

when he gave me back 1000 things were downloaded

Now I'm afraid that I get a fine because he may have downloaded something illegal

would they take the address from me or from the wlan where he had downloaded it?

How do you know he downloaded something illegal?

Can you document, from when until when you have borrowed the PC to whom and then hand it over to the police, if it should come to what I think is not very likely.

Make the box clean again. They attach themselves to the WLAN to identify the downloader if necessary. Greeting

Well, I would in your place delete all downloaded files from the PC and should there be problems exactly say what you have said here, namely that you had lent the PC in the appropriate period, which is actually downloaded through the Internet connection on the would have to prove