Eye, you recently made this observation of Muslims in another thread
You rightly point out in your post that the majority of LEO's do not violate our rights. You must surely see, however, just as "moderate" Muslims must denounce terrorists, "good" LEO's must denounce those who violate the rights of citizens. This has not been the case of late in regard to LEO's or LEA's and I'm afraid until you see LEO's en masse denouce these "bad" cops the general public's opinion of all LE will continue to sour.
You have a point there. However, a few things to consider:
1. These events are typically suspected criminal activity. Speaking about them during investigation would be inappropriate for LEOs.
2. These events are rarer than their presence on the Internet would indicate and far less world-newsworthy than 9/11. There would be far less opportunity for LEOs to speak out on specific instances in a way that gets world-wide attention.
3. Speaking out in general about police abuses would feed the impression that they are routine. They are not.
4. Officials these days bend over backwards to investigate these events when they occur. These officials also belong to the LE community, meaning that LEOs would likely feel that it is being handled and that they should be circumspect about discussing it.
5. Most importantly, sfter such events, LEOs aren't rushing to the media and,
instead of denouncing the horrific actions of others, lamenting that they will be hated for those actions. That is the complaint I was making, that the first reaction wasn't denunciation, but "We will be discriminated against," with that reaction being a self-fulfilling (and, therefore, self-serving) prophecy.