Stamford Police Sgt. Steve Perrotta said police are working with security video footage that shows the back of a male suspect walking away from the building after drawing the symbols around 10:45 a.m. Sunday night. On Monday around 11:30 a.m. Stamford police officers discovered what appeared to be a cup of feces around the corner on Tresser Boulevard and collected it as evidence, Perrotta said.