We used to catch the bad guys pretty well. Some of the most famous bad guys of the depression era actually had short careers. (With the exception of the bootleggers who corrupted most local governments because the people did not want prohibition and so tolerated the crime).
Title X isn't about catching interstate criminals. It's and amendment slipped into a bill about catching interstate child predators, but itself won't catch any criminals. It will cause misery to good people who find themselves afraid to confront any bad guys of the protected class. A thought crime has no real proof, it's arbitrary, and so will only help those who don't have facts.
"I think he means that appropriate federal help is useful for catching the serial killers. Interstate flight is where the FBI can help."
That was just what I meant. Thank you.