As I understand it, this won’t fly unless they can prove the state knew the report was false and proceeded anyway. I sincerely doubt they can do so, as I believe the state initially acted in good faith.
Otherwise every search warrant later shown to be based on inaccurate information would be thrown out.
Is Jeffs the only lawbreaker in that cult? I don't think so, and I doubt the authorities do, either. When young, indoctrinated girls are assigned to marry some older man, or for that matter ANY man, that man deserves to be prosecuted.
The adult women who quietly stand by and allow this to happen need to be charged with a crime, even if they had the same experience. This is a sick social group and maybe some jail time will bring them to their senses.
There are other problems other than just accurate information. A warrant is supposed to be based on "oath or affirmation", but one can hards swear to the veracity of someone who they don't even know. Generally warrant affidavits say something like "Joe Blow, personally known to me, stated that..., or even if no name is provided, they'll still "based on information from a usually reliable source *known to me*". Nobody knew who this Sarah was, and they didn't try to find out either. Which would have been difficult, since she apparently does not exist.
There's a whole lot of odd stuff in conjunction with good old "Sarah". For example, she continued to call the "crisis center" while the raid was ongoing, and even after at least some of the children had been taken. She reported accurately on goings on with the children, as well as weather at the places they were being held. IOW, someone was feeding "Sarah", AKA "Rosita" (IIRC) information from the scene, while she was all that time in Colorado.