PROVIDENCE -- Detectives are investigating the robbery of a CVS Sunday.According to Commander Thomas Verdi, a man walked into the CVS at 799 Hope St. at about 6:40 p.m. and demanded that an employee open the register.The employee opened it, and the suspect grabbed money and fled, police said. The suspect was described as having tattoos on his hands and was wearing a dark zip-up hoodie, jeans, a camouflage baseball hat, reading glasses and had a full beard, police said.