Excuse the bar room psychology - but the JW belief is resurrection for all who die before Armageddon (except suicide).
Someone who is suffering from severe depression and trying to hold together his marriage, his family, probably his job, his self-esteem within the strict confines of the JW doctrine and the scrutiny of the KH, could this be a way out. The thought of not being good enough to get thru' Armageddon and loving your family so much that you are willing to forgo the chance yourself, by killing yourself and your loved ones. At least your family will see God's New Order and *short-cut* the terrible end of this system of things - even if you won't.
These people need help.
Si