Amy Kasehagen would wait, recording, hiding in the bushes filming Bronson Hayter leave for work.
She would follow her and photograph her.
She broke into her house and took images of the contents of her fridge and entered her bedroom and took a photo of her bed.
She watched and stalked her, soaking up every detail, what she wore, where she went, when she got her mail.
She learnt everything she could about her.
And then finally she planned to kill her – all because Bronson Hayter was dating Kasehagen’s ex boyfriend.

Bronson Hayter after the attack. Image via Nine News.
Yesterday the Supreme Court in Adelaide heard 32-year-old Amy Kasehagen hunted down her victim "like a rabbit in a spotlight".
Kasehagen had become obsessed with Ms Hayter and had her under extensive surveillance in the months leading up the attack.
In April last year it culminated when she broke into the home of the 28-year-old in Adelaide’s beachside suburb of Glenelg and tried to kill her.
The court heard that Kasehagen had become “consumed with jealousy” reports the ABC.
Supreme Court Justice David Lovell said Kasehagen’s surveillance of Ms Hayter was chilling, including photographs of Ms Hayter’s home and car, details of her work and notes written by Kasehagen debating whether to “kill”, “knock out”, “scarf choke” or “suffocate with bag” her former partner’s girlfriend.
The court released video surveillance taken by Kasehagen.
In it Kasehagen, who suffers from an eating disorder, hoarding disorder and a borderline personality disorder, follows her victim, taking note of her day-to-day activities and narrating the scene before her.
Top Comments
OMG - that woman is not sane.
Personality disorders need to be discussed more widely, and how to deal with them privately, professionally and socially. They are quite dangerous. People with these disorders can be so normal up to 95 per cent of the time, and then have very destructive, frightening episodes or meltdowns during the other 5 per cent, or even less frequency. But they are BAD episodes.
My own mother, who is otherwise very intelligent, capable, and can even be funny and charming, sadly has undiagnosed a borderline personality disorder and/ or paranoid personality disorder. She refuses to see her doctor about it and be honest about her behaviour. She won't get treatment from medication or a psychologist. She finds the very idea of it incredibly insulting. But it has plagues her family, romantic and professional relationships her whole life.
She gets obsessive and controlling of those close to her. If she perceives 'signs' of abandonment, rejection or independence (i.e. people pulling away, usually because something is off in the relationship), or if she thinks she has been scorned (e.g. she has imagined having enemies, been suspicious of people plotting against her, been suspicious of her adult children being 'secretive') she will fly into rages where she cannot control her emotions outbursts and actions).
She makes threats to instill fear, which she sometimes attempts to follow through. Later, when she calms down she will forget large chunks of the events, or otherwise thinks they are perfectly justifiable and that the other party has behaved incredibly poorly to deserve some 'confrontation'.