It would not be considerd "Wreckless driving" if you did not use your turn signal it WOULD not saying it is but WOULD be "illegal/improper lane change" that is a $120.00 ticket. But you said you used your turn signal so therefor it rules that out. Find out what department he works for and arrange a meeting with his Commander in cheif and im almost positive it will be dropped. Good luck man hope all turns out good.