SIOUX FALLS, S.D.—Investigators questioning South Dakota’s attorney general after a fatal car crash pressed him on how he did not realize he had struck a man and whether he had been reading email and checking news sites on his phone immediately before, according to videos of their interviews. In two videos released by Gov. Kristi Noem late Tuesday, criminal investigators confront the state’s top law enforcement officer, Jason Ravnsborg, with gruesome details of the crash, at one point telling him: “His face was in your windshield, Jason, think about that.” Ravnsborg appeared unsure of how he had swerved onto a highway shoulder and killed 55-year-old Joseph Boever, but detectives told him Boever’s glasses had been found inside his Ford Taurus and that bone scrapings were found on the rumble strip of the highway shoulder. Investigators said they found one part of Boever’s severed glasses on the front, passenger-side floorboard and …