It's a scam, mon ami.
http://www.mormonthink.com/tithing.htm
In any crime, follow the money.
http://www.mormonthink.com/tithing.htm
Quote:Members of the LDS Church are to pay "one-tenth of all their interest annually."[1] Every year, each member is asked to meet with the bishop to declare their tithing status: full-tithe payer, partial-tithe payer, or non-tithe payer. Tithing is considered a debt.[2] However, it is also an entrance fee—only full-tithe paying members are allowed to enter the Church's most holy place, the temple, and participate in important saving ordinances.
In any crime, follow the money.