This question comes up every basic SRO class we have. Thankfully we have been able to contract with a educational law attorney who has a background in criminal law to assist us in teaching our basic class. This Q&A was provided by her as some guidance. It comes from the Privacy Technical Assistance Center of the U.S. Department of Education.
"School officials routinely seek to balance the interests of safety and privacy for students. While the Family Educational Rights and Privacy Act (FERPA) generally requires written parent or “eligible student”1 consent before an educational agency (district) or institution (school) discloses student education records and the personally identifiable information (PII) contained therein, FERPA gives schools and districts flexibility to disclose PII, under certain limited circumstances, in order to maintain school safety. The purpose of this guidance is to address questions about how FERPA applies to schools"
Please click the below link to download the PDF. I have found it very valuable.