Wow thats a tought..Iam so sorry to here about that and for you and his family...The only thing I can say is that he was obviously hurting pretty bad on the inside and perhaps couldn't get over his dads suicide so thought he could join him....I do study Gods scripture alot and do know that everyone who dies Goes back to be with God. The chirches might not teach you that but there more concerned about scaring you into there church to get some cash from you then about teaching Gods word correctly....I have no doubt that your friend and his father have been reunited...You see my friend NO one is judged until judegment day and thats not until AFTER the Lords day which has not begun..Dont get me wrong some who die and go back to heaven are kinda seperated from God spiritually if they didnt get it together in this lifetime but there still with God and not in Hell or anything like that..I can only imagine how this family is suffering, I study online at a very scripture based church i have learned alot perhaps it might help you and your friends family to check it out, now is a good time to seek God after a tradgedy like this...Best to you.
Your Friend
Bob

heres the site www.shepherdschapel.com