They tore it apart hoping to find ANYTHING illegal so as to come up with a justification for the raid.
Yep.
Because if they can find that you were keeping two pet guinea pigs without having proper licenses clearly displayed in 14 languages they can say, "See! They were breaking the law."
I always remember the case of Justine Diamond. She was shot by the police for tapping on the window of their cruiser.
The police then spent hours searching HER house.