1) Yes, officer 2 can issue a citation or ticket based on something seen by officer 1: there is no legal requirement that an officer see the infraction personally, but rather may rely on other credible evidence or testimony, such as the observations of a fellow officer.2) The fact that it is a "trap" is irrelevant: the police are allowed to create areas or checkpoints where they more aggressively enforce the law (such as, for example, sobriety checkpoints). Based on what you write, you do not appear to have a good defense.