BB Gun vs Cyclists - Hampshire

They can't pin it on this bastard even though:

(1) He's at the scene of the crime.
(2) He's raging drunk and has OBVIOUSLY just been in a crash.
(3) He has priors for drink driving.
(4) CCTV footage shows the X5 leaving the travellers site 3 minutes before the crash, then just after the crash a load of this guys mates running out (presumably to help remove incriminating evidence from the car.)
(5) He admitted being in the car.

Then they're not really trying. If he has facial injuries his DNA will be all over the driver's airbag (unless his mates removed it, I suppose). A drunk driver (coincidentally a copper) was done in exactly this way up in Tottenham a few years back.