I wasn't able to listen to the interview myself, so I'm only guessing. He had made a previous statement to the media today that LE was free to search the house at any time, he wasn't sure why they had gotten a warrant. I'm wondering if his statement about not needing probable cause wasn't meant to talk about the requirements for a search warrant, but instead supposed to refer to the fact that the family would give permission for LE to search, and thus no warrant was needed.
It seems odd for an experienced attorney (or any attorney!!) to say that probable cause is not needed for a search warrant, so I'm thinking there must be some sort of context to his statement that we missed.