Here's a story in the Guardian about a women who was visited by local police in New York after her family searched for pressure cookers and backpacks.

https://www.theguardian.com/world/2013/aug/01/new-york-polic...

Though it turns out the truth might be more complicated and it may have been her husbands employer triggering the search, not the FBI? https://www.darkreading.com/cyber-risk/pressure-cooker-flap-...