Becky's family probably suspected straight away who was involved. Especially as SH and NM did not participate in the searches (they were too busy with the cover up).
Becky's friend would probably have told police and possibly the family that Becky told her how NM said he would kill her. Becky was alone in the house with NM and SH, when she "disappeared" so how much of a stretch would it take to figure out who was responsible.
I don't like the direction this is taking with Becky's father painting her as rude and disrespectful to his wife. Whose side is he on? Becky did not deserve to be killed in her own house, by his step-son.
Becky's friend would probably have told police and possibly the family that Becky told her how NM said he would kill her. Becky was alone in the house with NM and SH, when she "disappeared" so how much of a stretch would it take to figure out who was responsible.
I don't like the direction this is taking with Becky's father painting her as rude and disrespectful to his wife. Whose side is he on? Becky did not deserve to be killed in her own house, by his step-son.