A normal, non-exit relay node will not be identified as "trafficking in illegal bits" by any sane police force. A normal relay will trade from A to B in only encrypted traffic and will not touch websites on the behalf of users, only other relays.

It is rare that an exit node is raided but there has been no known occurrence in which a normal relay was raided.. nor would it make any sense for there to be. Many people run non-exit relays as they are uncomfortable with the risk of exiting for the Tor network, perhaps you should be one of them.