TMZ Sports has obtained police video from Errol Spence Jr.'s horrifying Ferrari crash which shows a cop scrambling to get a blood sample from the boxer while he was being treated at the hospital.
... plus, the footage also shows officers found a loaded, expensive handgun at the crash scene.
As we previously reported, Spence -- one of the best boxers in the world -- wrecked his Ferrari during an Oct. 10 crash that was captured on video.
#BREAKING Exclusive video from a nearby security camera shows the crash that injured Championship Boxer Errol Spence Jr when he lost control of his Ferrari and it rolled multiple times ejecting him. Fortunately he survived and expected to be ok pic.twitter.com/2Z1xh9DDiA