It's pretty much been covered in the responses you have had already but just to reiterate say NOTHING to the police, if they pull you in for questioning they will probably try and scare you will all sorts of stuff but unless you give them something they have nothing, the only person talking in a scenario like this should be your lawyer. Nearly every single case of people who have been charged is the result of them talking and admitting to the offense. Clean your home, redact your hard drives and stay calm and do not allow yourself to be tricked or coerced into incriminating yourself, that's the best advice you will get.