Minyan Halachah: Mechallelei Shabbat

Rabbi, I was wondering if a Jew that breaks Shabbat in private, can he still be counted in minyan? >> That depends. The Gemara in Maseches Avodah Zarah explains that if there are 10 people that know that the person is breaking Shabbat, even though they do it in private, it's considered in public. Meaning the fact that there's public knowledge about this person's desecration of Shabbat on a regular basis makes it a public sin. He doesn't have to drive in front of everyone and know for everyone to know that he drives on Shabbat. So if everyone knows that he does not keep Shabbat, even though he does it in private, he still cannot be counted in minyan.