Cupach and Spitzberg suggest four catergories - from 175 reviewed cases.
Low agreeableness and conscientiousness.
Most had lost a parent in childhood in a sample of imprisoned stalkers. (Kienlen et al).
May compensate for losses through victim to alleviate grief.
Preoccupied Attachment: individual is too involved in the other and feels dependent on them.
Attachment is not the only factor, all stalkers…