Ideal traits of a law enforcement officer are many, a few would include:

Attention to detail--officer's are called upon to give testimony in court. They are trained in the skills of observation and in note taking skills. Both of these skills should be honed to deliver accurate information. Inaccurate information can change the outcome of the case.  

Honesty--law enforcement officer's must be honest and above board in order to fulfill the requirements of the position. Officer's are not to accept gifts or money from the public.                                   

Dutiful--a sense of duty to the force and to the public they serve must be evident in the officer's actions.