Bryan Die News Today

Grandson commit suicide. >> reporter: then, the next day, when state investigators led by agent ken thompson of montanas department of criminal investigation arrived and looked at the ruined crime scene -- >> my partner and i would look at each other and think, oh, my lord, you know? >> reporter: yeah. >> it certainly makes things very difficult. >> reporter: difficult? oh, yes. difficult was not the half of it. coming up -- what did happen to dr. rein? >> we had been told that he had committe...

I think that bryan then struggled to get in to call for help. that he sat there. i think the perpetrator stood there and watched bryan die. >> reporter: and as for the location of the gun so close to dr. reins own hand? so the killer mustve put it there? >> correct. >> reporter: but were there any fingerprints on the gun? >> no. it looked like it had been wiped off with a solvent. >> reporter: so investigators now thought they knew how the murder occurred. but when it happened? that wasnt clear ...

The shooter? >> pretty close range. >> so, if they struggle and the gun went off, it would be, right? >> yeah. some kind of conversation went on and a struggle ensued. two shots went off, and then the third shot into his chest. i think that bryan then struggled to get in to call for help. that he sat there. i think the perpetrator stood there and watched bryan die. >> and as for the location of the gun so close to dr. reins own hand? so the killer mustve put it there? >> correct. >> but were the...