That's alleged according to current police reports. It's not proved yet. LE cannot "prove" the facets of the investigation.
I think it's possible that they used cell phone records to place her in the car. Three figures appear inside the car but are not easy to identify.
They just arrested someone for using Phoebe's phone to interfere with (mislead) the investigation. That third person had possession of Phoebe's phone, according to what LE is now saying. They have not recovered the phone.
Detectives have charged a 30-year-old man in relation to the disappearance and alleged murder of 17-year-old girl Pheobe Bishop. It will be alleged the
mypolice.qld.gov.au