two sephiroths

[Sephiroth's Mate]

well this one a bit farfetched but

Rufus the presidents son could hav done all of these
--- he would want dear ole dad dead so he could inherit the family buisness.
--- he killed the president with sephs sword although he could weild its true power he could still use it as a normal sword and i dont think the president would expect his son to jus kill him hence why he didnt run away
--- he released jenova to make it look like it was her (so now shes out of being frozen in some chemical soup which stops her from doing anything)
--- he released cloud and co so someone would kill jenova (easyer than sending an army to there death)
--- he jus happened to be there the day it all happened after being away on buissness for ages.
--- tell me if ive left something out

also another farfetched one could be the guard opened the cell in order to find someone strong enough to kill a nutty beast runnin round killin stuff. but before the guard woke cloud he was himself killed. jenova sensing the jenova cells in cloud left him alone for some reason
(maybe she was still a bit out of it after being in some chemical stopping her from moving for the last few years)

but if non of these are plausable id go with pheonix's idea coz he got supporting evidence