In reality not a lot you can do except plays heads up ball. If one studies these Killers the one item which stands out is they all appear to be completely normal. They are only caught when they make a small mistake.
The latest one of the Over the Road Truck driver they think is linked to over 90 Homicides, and probably a lot more. Would pick up thse young women in one State and dump their bodies in another. He was only caught when he was pulled over and the Trooper loooked in the sleeper portion of the Truck. He found a young woman tied up, beaten and branded with cigarettes. Too avoid the death penalty he telling authorities about his homicidal reign
People who involve themselves in police investigations are often viewed as suspects. So even if they aren't the criminal, they take resources away from finding the real criminal.
So by not getting involved, I'm helping the police.
Well I have tracking skills and I have a trained tracking dog so I could probably flush them out pretty quick if the Royal Canadian Mounted Police put me on the case. But that likely won't happen because of sour grapes (I was in the cannabis biz for 10 years and they couldn't catch me). Cheers!