I live in the state of Colorado and I was recently detained by a rookie cop who was accompanied by a more experienced officer for a municipal code violation of being in the Park after hours. Although the reason I was told I was being detained was for trespassing the officer did have probable cause to detain me though under the auspice of a municipal code violation. He did ultimately release me with only a warning. However after he searched me he brought my hands behind my back as if he was going to handcuff me. As he did this I relaxed my arms letting him move them at his will. When he did this he bent my elbow in the wrong direction hyperextending it. At the time I only felt a slight discomfort do to my body's natural release of endorphins. None of the officers had been on scene are aware that I was injured. Approximately two hours following my release I begin to feel an immense amount of pain in the arm where I had felt the discomfort as he brought my hands behind my back. The same day I did go to the hospital where a doctor who specializes in trauma diagnosed it as a sprain and confirmed that there was bruising and swelling. I am currently following treatment for this injury by taking at least the next week off of work as requested, wearing a sling, taking anti-inflammatory medication, and taking a very unpleasant medication I was prescribed to make the pain bearable. Although this is something that is typically expected to heal on it's own the doctor also wasn't willing to rule out the possibility of further complications. If there are no further complications it is my understanding that it will not be worthwhile for me to file a lawsuit. In any case I would like to make the officer who leads the Patrol Division aware of my injury and the officers improper technique so that his inadequate training and/or over aggressive behavior can be addressed, but I am afraid that if I do report my injury I will end up getting charged with the municipal code violation they let me off with a warning for as a retaliation.