Do you realize how many trucks are in and out of any given truck stop per hour? Not to mention, a truck stop would be the last place you'd want to kill somebody. Cameras everywhere (including dash cams), well lit, and trucks parked feet from each other with people wandering around back and forth from the store constantly. If you've ever been parked next to someone that decided to buy a reptile, you know those trucks aren't built to be sound proof.   The FBI is letting them get away with it .. in this the day of ELogs the DOT knows where each registered trucker is at all times  DOT doesn't have 24/7 access to our logs. During an inspection it's still similar to paper logs except, instead of handing your log book over, they give you an email address to email your logs to. Also, there are a shit load of drivers still running paper logs under exemptions. Just look up local driver regulations, live stock haulers, gliders, pre 2000 engines and a slew of other exemptions to Elogs/HOS. Not saying its not possible, but the FBI having suspicions isn't exactly reason to worry. I'd argue it would actually be harder given how much a big truck stands out and how restricted you are when it comes to where you can safely drive a truck. Its not like you can take a tractor to a remote area for the most part.  Just realized this is everything a serial killer would say...