Call the police. Sounds like the child's safety and that of other people are at risk. As always, evidence is essential (any CCTV as well as witnesses?). Take care.
This man had a collision with a cyclist on the 17th of June, in Potter Street but unfortunately he gave false information so now it is being treated as a hit and run. If anyone knows who this is, please give the correct information to the police.
I recognise him. It's almost certainly Professor Weinberg of the University Physics Department. One of the area's notable intellectuals, renowned for his repartee and knowledge of Ballet.
Should go to the police.