From the smoking gun (caution: tabloid):
Setting fire to the church where you are scheduled to be married is no cure for a bride-to-be’s cold feet.
Police allege that a 25-year-old woman started a blaze earlier this month inside a Utah church as family members were setting up for a wedding ceremony planned for the following day, according to a probable cause affidavit. After a fire alarm sounded inside a Church of Jesus Christ of Latter-day Saints building in Kaysville, a Salt Lake City suburb, relatives were able to put out the flames with a fire extinguisher and “water from some of the wedding decorations.”