investigators in Washington DC discovered the suspicious substance inside old safe left in front of his new home . On - ray testing failed to identify the liquid , but it had a chemical reaction with water . samples of the white gooey matter were sent to environmental lab for further testing .
Homeowner in Washington DC discovered the suspicious substance inside old safe left in basement of his new home . On-site testing failed to identify the liquid , but it had a chemical reaction with water . Vials of the white gooey matter were sent to environmental lab for further testing .