well if i know i am liable for speeding as i was over 80km/h than should i just plead with explanation or should i still go for defending my self. and the car ahead of me was not that close to me (almost 1 km distance between me and that car) that officer can not turn back officer had enough time to...

i have speeding ticket for 128km/h in 80km/h zone i am planning to fight ticket how should i do that? i am probably so i was not atleast 128 but less than that and car ahead of me was going 102 kh/m as told by officer it self than why wAs he/she not booked for over speeding. what should i do in such...