Didn't see any info regarding Schengan visa and Switzerland. Basically, even though CH is not yet accepting Schengan visa in general, citizens of certian nations are permited to enter CH legally with only a Schengan visa and not a Swiss visa. Here is the information:
Schengen visa
The Schengen visa is not valid for Switzerland .
Exeptions: Citizens of Bahrain, Kuwait, Oman, Qatar, Taiwan, Thailand, Saudi Arabia and the UAE can enter Switzerland with a valid multiple entry Schengen visa.
(source:
http://www.eda.admin.ch/eda/en/home/...nf/visnzl.html)
I am thinking maybe this is why some ppl have posted answers and experiences that implied a Schengan visa may be used to enter the country. But India is not on the list.... so, take your own risk when leaving the airport from Zurich. He should be allowed to leave, but whether he will be caught and left with a bad records or not is partially dependent on luck, as I am afraid.