The day had gone by running back and forth into the police station with no sign of clues. David was doomed. He was conned very smartly. They were professional at doing that. The papers were fake, the sign were fake, everything they provided was fake and the police was unable to track or even identify the papers they provided.
He was at a dead end. The other party was asking for full payment and he was depending on the pay of runaway party who would have provided him today.
There was no other way but to tell the truth to the party. He can't arrange money this soon... only if he begs his father for money and he wasn't going to do that even if it meant to die.
He will figure out something but reaching out anyone from back home would be the stupidest move to make.