The boy reads "Kozure Okami" ("Lone Wolf and Cub"), a famous Japanese manga about a betrayed samurai who tries to restore his honor. In the 1970's there was a Japanese TV series adaption of the manga.
Mac Taylor (Gary Sinise) tells CSI Lindsay Monroe (Anna Belknap) to use her affinity for bugs to find out what the beetles know as they were the first on the scene. He adds, "And no eating!" This is a reference to Fare Game (2006) (#2.15) in which Monroe and CSI Danny Messer (Carmine Giovinazzo) were seen eating a meal comprised of battered spiders, centipedes, and crickets, among other such foods.