Just for your information, and please know that I am not a forensic dog expert. But, I do have two very talented Belgian Malinois.
The Czechs breed very good dogs. That said, the quality of the dog depends on it's bloodline, and it's training. You can get excellent dogs from Czechoslovakia. They are not interested in Westminster prizes, etc. They are more into breeding for health, trainability, and working temperament.
Most American dogs are bred for "looks", and the breeders don't pay that much attention to health or working ability. There are exceptions, of course. The breeder of my Malinois was going for working ability, and has placed many of her puppies to working homes, police persons intending to train them for cadaver search, etc. The sister of my is doing this kind of work in Maryland.
I can tell you that the two Belgians that live with me would work until they dropped, if they were trained for this kind of work.
I chose to train them for house and yard protection, and they will do a perfect "bark and hold". This means they will "air-snap on each side of the intruder, be it animal or human, snarking ferociously on either side of them, doing a perfect "Cujo" imitation, but never drawing blood. My front door is down to bare wood from their warning visitors.
Now, if they know the visitors, it is all show and warning. When it is a friend or relative, we open the door and their behavior instantly goes to friendly smiles and happy licks.
But, God help a stranger! He would be running like the wind, and they would be in full chase!
These dogs can be trained to do anything, and they will work until they drop dead from heat exhaustion. We owners have to be very careful not to let them overheat/overwork, or all the training we have put into them will be lost.
Cadaver dogs are trained for a specific purpose and a specific scent. These are very different from "Search and Rescue" dogs.
Certain breeds are best at certain types of training. Please do not disrespect the Czech dogs, for the European breeders pay a lot more attention to working ability than American breeders do, in general.
And, if any of you are interested in good working dogs, pay no attention to the Westminster (AKC) bunch, for they are kind of like the "Miss/Mister America" of dogs.
If you want a good working dog, ask the breeder how his/her dogs do in the UKC trials. Go to a few of those (like watching paint dry!) and find the best breeders at one of those shows!
Just my rant/opinion on excellently bred dogs. The Czechs do breed good dogs!