Which crimes should we expect companies to do this job?
I would imagine that allegations of murders would qualify, as would man slaughter. Clearly armed robbery or any form of crimes that involve bodily harm. Since we are dealing with a imaginary taxi driver, anyone alleged for scamming people seems reasonable that the taxi company end the employment in order to not enabling further crime.
But here come the question: Why would this system be preferred over the existing system of police custody? Is the taxi company more suited to evaluate the risk for further crimes?
"If they did so, and he raped a second woman, would you argue that the taxi company had absolutely no responsibility"
If the police let the person go and they raped a second victim, would you argue that the police had absolutely no responsibility?