The Usual Suspects!!

I popped into the allotments today and saw this.
Apparently, there has been some drug dealing going on among the pot-heads - a bit of grass, some weed - and the police  arranged an identity parade to try to pick out the culprits.
Eye-witness statements varied a bit e.g. one or two eyes, large or small, but they all agreed on one thing. The offender was purple.
I hope they get the right one.
(It's the sun don't you know!)