They do not need to give a sworn written statement and instead can simply identify the officer and report misconduct. Similarly now immediate supervisors can play a crucial role and since they are aware of the conduct and watch officers more closely, they can also report misconduct on part of an officer. The fact that no written proof of misconduct exists should not pose a problem if there are enough witnesses to file a report. Even if no disciplinary action is initiated, the report will give the agency a chance to observe the officer more closely and to see why there are more complaints against one officer and not another. This process even if it remains unofficial is a good way of showing the police officer in question that she is being monitored and her conduct is not going unreported.

Police officers like Ima and their behavior must not be ignored because sooner or later it can cause serious problems for citizens and other police officers as people like Ima act out of their...

They become a threat to society and give a bad name to the police agencies. If a citizen's constitutional rights have been violated, he has every reason to lodge a complaint against the police officer and since he can stay anonymous, he doesn't need to worry about being harassed by the police officer (Champion, 2001). The process of initiating a disciplinary action requires careful thought. Hence many supervisors would simply be more willing to lodge a complaint and allow agency to monitor the officer for a certain period of time to determine if complaints are justified or unfounded. In any case, there should be some action taken against police officers like Ima who are clearly out of line in their actions and behavior.
References

Champion, D. Police Misconduct in America: A Reference Handbook 2001

Ryals, S. Discovery and Proof in Police Misconduct Cases 2002

Harrison, J. Police Misconduct. Legal Action Group 1987