Another explanation often advanced is the idea that police officers will undergo some traumatic experience in their police work that they never recover from, leading to suicide, divorce, etc. However, since the effects of such traumatic stresses is readily recognized, there are usually proactive programs in place to help individual police officers deal with the psychological effects of a traumatic event. Unfortunately, there is some evidence that such programs are actually ineffective, especially group therapies, may re-traumatize the participant, weaken coping mechanisms, and contribute to the development of post traumatic stress disorder (PTSD).[21][22][23]