Molly McLaren was killed by Joshua Stimpson – who admits manslaughter but denies murder, arguing diminished responsibility – in a shopping centre car park at the Dockside retail outlet in Chatham, Kent, on 29 June last year.
On the morning of Ms McLaren’s death, Stimpson, 26, arrived at the outlet’s PureGym where she was working out and placed his exercise mat near hers, prompting the 23-year-old to text her mother: “Mum he’s turned up at the gym and come next to me.”
Her mother told her to go straight home, but shortly after getting into her car she was attacked.
Video of Stimpson in a blood-stained top moments after he launched the attack was shown to jurors at Maidstone Crown Court on Tuesday, taken from body camera footage from police officers as they arrived at the scene.
Prosecutor Philip Bennetts QC argued Stimpson had “carefully considered the execution of Molly” and said he was “following her movements, waiting for the moment that he has chosen to kill her”.
On Tuesday the court heard how Ms McLaren had told friends she felt like she was constantly having to look over her shoulder because of Stimpson’s behaviour.
“Feel like I’m f****** looking over my shoulder all the time,” she said in a nervous WhatsApp message just before Stimpson attacked her with a kitchen knife he had bought from a local Asda two days before.
Jurors have been told how the pair had been in a seven-month relationship after meeting on Tinder, but Ms McLaren ended it during a night out in Maidstone on 17 June after they began to have problems.
Stimpson was said to be “angry” with the break-up, having been told by Ms McLaren in texts that his behaviour had become “childish” and “pathetic”.
After they split up, Stimpson posted derogatory comments and photographs about Ms McLaren on Facebook, including claims she was taking drugs.
She told friends he had become “really nasty”, adding: “He’s literally lost the plot. I was worried he was going to turn up at my house.
“I’m actually scared of what he might do to me. He knows my parents are going away for two weeks.”
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Stimpson was reported to the police and warned about his conduct.
The trial continues.