Now comes the exquisite twist: Further investigation revealed that the son was, in fact, Ronald Opus. He had become increasingly despondent over the failure of his attempt to engineer his mother's murder. This led him to jump off the ten-story building on March 23rd, only to be killed by a shotgun blast passing through the ninth story window!

The son had actually murdered himself, so the medical examiner closed the case as a suicide.

@Mukiha so can we conclude that Ronald Opus lived with the parents on the ninth floor?
And if so why did he have to go to the 10TH floor?
Good read on a monday morning

@Dossy,
Wewe bado iko singizi kabisa .....We are clearly told that Upus went to the top of a ten storeyed build....Not the tenth storey!!