Here are some helpful resources for families about suicide:
https://www.preventsuicideny.org/schools-colleges-universities/for-parents/
https://www.dougy.org/resources/audience/parents-caregivers?how=suicide&who=&type=
https://www.heysigmund.com/building-resilience-children/
Most importantly, if you are concerned about someone, reach out— help is available.