Is cycle sport encouraging uptake of cycling?

Apparently there was an inquest recently into the death of a cyclist where the driver had asserted that because the woman cyclist wasn't wearing a helmet, lycra, whatever, cycling fast and asssertively, that she was in some way not a 'proper' cyclist, which somehow absolved some of his reponsibilty for her death.
Apologies for being a pedant but can you provide citation for this please?