Retail Lawton, OK – Arson fire at Dollar Tree last month put out with help from sprinkler system August 13, 2018 viking210 A Lawton man is now charged with arson after police say he started a fire in a Lawton store last month. Police say 20-year-old Thompson Williams is the man who was caught on surveillance video setting a fire inside the Dollar Tree on 2nd street on July 15th. They say his arson attempt failed because an employee using a fire extinguisher and the store’s sprinkler system put out the flames. Williams is charged with fourth degree arson, and is set to appear in court in October.