A 26-year-old man was arrested Wednesday after he entered the Hillsborough County Courthouse with a gun in his briefcase. Steven Jan Satori of Gulfport entered the courthouse about 3:45 p.m. and put his briefcase on the conveyor belt that carries items through an X-ray machine, said Tampa police Capt. D.N. Morrill. When security officers found the gun, police were called. Satori was arrested and charged with carrying a concealed firearm without a permit, a third degree felony, Morrill said. He was booked into the Hillsborough County Jail on $1,000 bail Wednesday night. A notice posted near the door to the courthouse advises visitors that weapons are not allowed in the building, Morrill said. Police officers must leave their weapons with security before entering the building, she said.