That,too,is distinctly possible.She *is* a wackjob.And assuming you know Chicago better than I you've just confirmed my belief that Wilmett is a wealthy suburb...which,IMO,lessens the possibility that she's been the victim of foul play.
Mostly million dollar homes with good police who rarely see a violent crime. Kids walk home from school. And Chicago criminals have a hard time getting to Wilmette. If she finds a bad end, it was her own doing.