The same recourse when you're false-positived by a witness, I'd assume: get a lawyer. Personally, I'd probably place my trust in facial recognition (possibly not this system specifically, though) over human eye-witness testimony, based on my understanding of human psychology and its vulnerability to incentives.
It's not as dire as it's sometimes painted. MD attempted to apply mass-ticketing with intersection cameras, and it was found to violate the state Constitution because the use of a car in committing a crime didn't imply the owner was behind the wheel at the time.
If the technology is unreliable, we call it out as unreliable. What society is going to need is people well-versed in the ways the tech can fail to be good, not a doom-sayer's disregard of the ways the technology can help.