According to the link you posted, the father was already not liked by authorities. CPS is the least regulated, therefore the most often abused, and no one questions anything done "for the children." It would not shock me to learn that in the absence of any legitimate probable cause, CPS was unleashed with an anonymous tip. By the time the dust settles, and a Judge hears the case and perhaps even drops it, the family will have been traumatized, and accrue significant legal debt which can't be paid with an "Oops, my bad."