Car. They went over a give way line and didn't give way. More caution on the part of the bike could've prevented it but that doesn't make it his fault.
As for leaving the scene, I guess since there was no collision they weren't actually involved. He'd have probably been better off insurance-wise to drive into her.
As for leaving the scene, I guess since there was no collision they weren't actually involved. He'd have probably been better off insurance-wise to drive into her.