Well, that is interesting.
A person of interest has clammed up. Sounds like it could be Karen's husband, as the stepson is said to be cooperating with police.
And police are taking his allegations seriously, as they should. Maybe he will be quiet on social media now.
I initially thought it was the husband, too. But i don't think it is; it is the stalker who i think is living nearby in Milleara Rd.