Facilitation of a Dangerous Topic

In about three weeks, I begin the facilitation of a YDL seminar in Youth Suicide Prevention, Awareness, and Response. I’m seeking out a guest speaker for the seminar; it’s not as easy as one would think. I reached out to UMPD; they declined, because they aren’t experts in the topic I’m looking for. That’s fair. I don’t know who is the expert in this field, and that is part of the problem. Where do I reach out to find a community resource that can help a youth worker understand what to do when they discover a suicide idea in a youth?