<i>"Autopsy regulations greatly vary from country to country."</i>

Alcor and CI are both located in the United States, and a corresponding very high percentage of cryonic members are thus from the US (there are major transportation and logistic issues involved in cross-continent shipping of a body in sufficient condition to still make preservation viable).

Even if you go out of country to kill yourself, getting the remains shipped to Alcor will probably be very difficult, both because of the difficulty of shipping remains normally, and the suspicion invoked by the death being the result of an illegal-in-the-US suicide...