A 21-year old Mount Vernon man has been arrested in connection with a weekend fire that caused major damage to a business and injured a firefighter.  Alec McLaughlin has been charged in Jefferson County court with three Class X felony counts of Aggravated Arson Knowing People Present and three counts Arson to Real or Personal Property Exceeding $150,000 in Damage.  Sheriff’s reports claim McLaughlin set fire to Rend Lake Boat Storage last Friday.  Reports indicate McLaughin ran past the alleged arson victim and climbed into his car.  Authorities say the woman’s business suffered serious fire damage during the incident.  Fire officials say McLaughlin lit one of her vehicles on fire, which caused the flames to spread.  Jefferson Fire Protection Chief Robert Beal says the flames spread to a number of other vehicles, with the one set on fire being completely destroyed.  He also sustained first degree burns responding to the fire, an injury that raised McLaughlin’s charges to Aggravated Arson.  First responders say when McLaughlin tried to escape, he drunkenly crashed his car as he fled.  Damage to the storage facility is estimated at $100 thousand.  It is unclear why McLaughlin targeted that particular business.  He remains in custody in the Jefferson County Jail.