Whereabouts of the Dark Photograph (1)

Hattori tells Conan he found someone that has knowledge on Ethan Hondou's father; However that person is dead but his grandson, Souhei Nishigun, has a photograph of Ethan's father. Conan, Vi , and Agasa travel to Nishigun's apartment and realize that someone has stolen Nishigun's photograph album and deleted the data off his computer.