Unless you're a strong trained swimmer, it's almost a certain that trying to go in after a person drowning will just result in you drowning too. People who are

Unless you're a strong trained swimmer, it's almost a certain that trying to go in after a person drowning will just result in you drowning too. People who are drowning will panic, they will use anything and everything to try to catch a breath, including using you as a stepping stool. There's a reason lifeguards have a flotation device and are trained on rescuing someone who is drowning. These cops should have tried to do something more to rescue the man, but jumping into the water to rescue him would have probably just resulted in two deaths instead of the one.