Obviously the student is seeking information about Huck's faked murder in Chapter 7 of the novel, wherein Huck, having had his fill of Pap's murderous DTs, kills a pig, smears its bllod all over the hut and an ax handle, and drags the carcas to the river to make it appear he was murdered and his body left in the river. He, Jim and Tom all refer to his having been murdered, although he is hale and hearty, which may account for the teacher's referring to his faked death as a murder. This must be her way of trying to get students to read--if they think it's gory, they'll read it.