For the benefit of readers, no, Concerned Dad and Concerned Oz are not related :)
Concerned Dad - the grief you must be feeling is something one cannot imagine - I hope you have a support group, family, system.
I opened a thread on Landmark LGAT to discuss co-related murder and suicide from participation back last year sometime:
Since this thread, there was a missing person's case of a teen near Denver I recall last year round July. There is a thread on this too from the boy's sister somewhere.
Executive Success Seminars - NXIVM, have also a number of associated suicides from weekend course participation and a search on the RR database will lead you to them though I can't place where the suicide articles are: [www.culteducation.com