Early Monday morning, business owners throughout St. Tammany Parish arrived at their shops and stores to find front windows broken and cash registers stolen from within.  Stores in Mandeville, Slidell and throughout unincorporated St. Tammany parish were affected.The Sheriff’s office and Mandeville and Slidell police departments quickly assembled a team of investigators to work the case.  Working together, the group identified a suspect within a few hours. Investigators were able…