Attempts by the parents of a student killed in the 2018 Marjory Stoneman Douglas High School shooting to sue shooter Nikolas Cruz’s mental health provider deteriorated at the Fourth District Court of Appeal, which ruled Wednesday that the facility owed no legal duty to victims.

“It is difficult to predict any human being’s future conduct,” the opinion said. “Unlike scientific disciplines firmly grounded in mathematics, psychology is not a precise science, so courts should be cautious about expanding liability beyond the therapist-patient relationship.”