On the evening of Aug . 19 , 2017 , a Houston park ranger observed Schneck kneeling among the bushes in front of the General Dowling Monument located in Hermann Park in Houston . Schneck was holding two small boxes with various items inside to include what appeared to be duct tape and wires . After placing the boxes on the ground per the ranger ’ s request , Schneck took a drink of clear liquid from a plastic bottle , spit it out and poured the remainder on the ground . The ranger then noticed a timer and wires in the box and observed Cognitive.Inspection.SensoryObserve the Houston Police Department ( HPD ) .