offence of abetment for committing suicide was committed in india. so, it is triable in India. police of other country faxed the suicide note, it is clear from that they wants Indian police to investigate the matter. any way, Sec 180 of CrPC states as under-When an act is an offence by reason of its relation to any other act which is also all offence or which would be an offence if the doer were capable of committing all offence, the first-mentioned offence may be inquired into or tried by a court within whose local jurisdiction either act was done.
in my opinion sec 177 of CrPC will be applied. offence of abetment was committed in India, so Indian police is very much competent to investigate the matter. Sec 177 of CrPC states as under-Every offence shall ordinary be inquired into and tried by a court within whose local jurisdiction it was committed.
more over, there is no legal bar to investigate a matter by two or more countries jointly or independently.
i am totally disagreed with your last comment sir. sorry.