Jamie Lee Warn denies killing the 37-year-old Hungarian. He is accused of murdering Miss Besenyei and hiding her body in the boot of her car before dumping her remains at Le Pulec Bay. He then allegedly left her car on the beach at St Aubin.
Police analyst Tracey Wilkinson took the jurors through a slide presentation which compiled data from the phone records of Mr Warn and Miss Besenyei as well as CCTV footage of the movements of a man the prosecution claims is the defendant.
The contact between Mr Warn and Miss Besenyei was tracked back to five days before the date the prosecution contends he killed her – 10 May 2018.
The two exchanged friendly and flirtatious messages and she was also asking him for money, the court heard.
During the same time period she continued to communicate with her ex-boyfriend.
Miss Wilkinson also detailed which cell site Miss Besenyei’s phone was interacting with, which in the days before 10 May included that closest to her Maufant home.
From the day of the alleged murder, however, her phone interacted only at the cell site tower closest to Mr Warn’s home unless it was pinging the same tower as his phone elsewhere.
This occurred as the defendant went into St Helier to buy cleaning supplies on Saturday 12 May. At this time, the Crown alleges the defendant began messaging Miss Besenyei’s phone to make it appear as though she was still alive.
After Miss Besenyei’s phone went off the network forever – Sunday 13 May at 7pm – the crime analyst’s slides showed the overlap of where the defendant’s phone was interacting with cell sites as it coincided with CCTV footage the Crown alleges are his movements.
These showed a car believed to be Miss Besenyei’s being driven from the First Tower car park in the early hours of 14 May to the west of the Island.
The car passed various CCTV cameras on its journey as Mr Warn’s phone was registering at cell sites including those at Les Landes and Guernsey, which cover the northwest bays, including Le Pulec, at 1am.
The CCTV footage and cell cite evidence continued on to St Aubin with the defendant’s phone registering at a nearby site at 1.58am before the phone went dark until just after 3am when CCTV picked up a man matching Mr Warn’s description and clothing on foot near his First Tower home and his phone registered on the nearest site.
Miss Besenyei’s car was recovered from Le Haule beach later that day.
The trial continues.
