I genuinely don't know as a general principle , I do think it would depend on the nature of the offence .
Riot or theft /burglary during the riot definitely, yes.
Assaulting a PC during a student demo, yes
taking part in a demo that the police deemed unlawful, no
acting on being gay when those acts were illegal , no and would actively try everything to frustrate any prosecution
speeding ?drink drive ? no
I'm actually sure i would apply my own twisted judgement as to how grave an offence he had committed . Any way he is only 18 days old so i should have a while to get a more moral stance.