To be fair the only reason there was evidence was that they guy had to flee before he was done cleaning up. I don't blame the cops for their initial conclusions the level of premeditation in this murder was much higher than normal.
If anything, the impression that professionals do the job spotlessly seems like it goes hand-in-hand with the misattribution of this crime to a "professional."
From what's in the public record, even "professional" hitmen have their moments of conscience, laziness, procedural failures--and, apparently, quite frequently, presumably due to the moral pressure of conducting assassinations.
(Of course it's possible we don't hear about the hitmen who are truly pro-level, but I find that hard to believe.)
I think so. In the case of Mahmoud Al-Mabhouh, it was seemingly meant to look like natural causes:
> Initially, Dubai authorities believed al-Mabhouh had died of natural causes.[44] Fawzi Benomran, the Dubai police coroner, said, "It was meant to look like death from natural causes during sleep." It took 10 days for the Dubai police to come to the conclusion that al-Mabhouh was assassinated. Benomran described the determination of the exact cause of death as "one of the most challenging cases" his department faced.[45]
The team that killed him were on camera entering the country and in the hotel. However if they had been successful in convincing local authorities the death was natural, that would have made the (presumably very difficult to avoid) video evidence effectively irrelevant because nobody would have thought to consider it relevant.
