Failing To Obey Sign

I am going to trial soon. I have a question here and hope to get some advise.

I remember the officer who stopped me was not the officer who issued me ticket. At that moment, the officer who issued me the ticket was sitting in the policy car to write another ticket. When he finished it, he stepped out the policy car, handed ticket to another person and then walked to me and told me that I should not make the turn....

So, if this is the case, can I question the officer that since he did not see I made the turn but only see I stopped there, he in fact can't say I made the turn.

Thanks.

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