Sorry boy..='/

I ran over my cat - Boyboy last thursday night...
he was rushed to the vet's around 10pm..
Bone fracture of the left hind leg..
Was operated on on friday, inserted iron rods to hind leg to ensure the bones aligns and heals..
today...
Boyboy left...

turns out boyboy's bladder was also damaged... urine leaked into the system and poisoned the blood..

I feel like a murderer...

I'm really sorry...T.T