Text messages, CCTV footage, witness accounts and GPS data from Jack's phone have been pieced together to create a timeline of events after he went missing.
The last known journey of missing student Jack O'Sullivan, who vanished after a night out in Bristol , are recreated in this video.
His mother Catherine has contacted Apple directly to see if can help trace Jack, but due to built-in privacy measures, the tech giant does not have access to his AirTag's location data. 2.57am - Jack left the party alone. He walked south from the house along Christina Terrace and was caught on CCTV crossing the Junction Swing Bridge.
Just hours before vanishing after a house party in Bristol on March 2, 23-year-old student Jack O'Sullivan had even showed his mother how the tracking device worked at home. Jack, an Exeter University graduate who had been living at home with his parents while studying a law conversion course in Bristol, first went out for drinks and then to a house party in Hotwells, which he left just before 3am.
The O'Sullivan family went back to the police again, who this time indicated they had accessed the data. They were, however, told by officers that they thought 'the battery must be flat on the AirTag because it's not providing information'. 'But I actually contacted her this weekend just to verify that and she said, 'No that's not true, I didn't register it',' Catherine revealed. 'So we just can't get a straight answer.'
'And I know it was working so where on earth is it? Where is it registered to? And why hasn't it provided something? But while Catherine was forced to trawl through CCTV herself, she spotted a person - who she is adamant is her son - walking over Plimsol Bridge at around 3.25am, heading back in the direction of Bristol city centre.
She said: 'We're desperately trying to get hold of the phone data that they tell us they've analysed. And they tell us"we have already told you the findings". Well we would like to be certain of that, because they did the same with the CCTV.'So from our perspective, we can't trust what we're being told so we would rather have things ourselves and pay somebody to analyse it, and then we can then feel certain that it's done.
'And we want to see if we can try and plot a route or the last time that phone worked. If we can be a little bit more specific with the area then that's got to help in some way.' 'If it was plotting in closer to the water, or if it was plotted in closer to town, then you could draw your own conclusion from that.
'And I've had one saying he hasn't paid something to do with a drugs deal and therefore, if we paid that, then they'll tell us where he is. The police said that they did not feel it was necessary, so the family have paid for it to be looked at by a cyber security company in Manchester. 'I was ringing Jack's number up until half past 6, and it was it was ringing before it hits voicemail. So the technical people have told me the phone was functioning.
Catherine and her husband Alan previously told MailOnline that they feel they have been 'badly, badly let down' by Avon and Somerset Police and even lodged a formal complaint.
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