The Los Angeles County Sheriff’s Department is investigating whether graphic crime scene photos of a grenade blast that killed three detectives were improperly shared internally, officials told The Times. Sheriff’s officials have declined to release further details in the matter. “This isn’t acceptable under any circumstance.”Luna, through a spokesperson, declined to comment on the current internal investigation. A spokesperson for the Sheriff’s Department said they are aware of the claim. The second grenade, officials said, remains unaccounted for.