Copyright 2003 Houston Chronicle An 18-year-old Cy-Fair High School student has been charged with felony arson and felony criminal mischief for two flag-burning incidents in northwest Harris County last month. Randall W. Heinrichs, of the 14500 block of Enchanted Valley in Cypress, was arrested at his home Saturday -- his birthday. His family posted a total bail of $12,000, and Heinrichs was released to await trial. Arson investigators said a second Cy-Fair student, who is a juvenile, may also be charged in the cases. Victoria McCord, owner of Lumber Tag Specialties of the 13300 block of Skinner Road, said he...