just happy and always has been. reporter: montgomery county police say investigators believe that william was killed august 1st after they viewed surveillance footage from a germantown storage facility. the footage was from the morning of october 1st. the clothing on the body is similar to what william was wearing on october 1st. reporter: chief major said lopez and william made two trips to the storm facility that day and it shows william in a playful mood. how he was killed and why is unclear. curtis lopez is not talking to police. scott box flew over the scene after the body was discovered. we had that shred of hope that we would find william, that maybe the suspect dropped him off somewhere and said, you know, keep william. that is what we were praying for. reporter: investigators believe that curtis lopez stabbed his wife to death before taking her car and driving it charlotte, north carolina, where he was eventually arrested. the body was not discovered until