While Escamilla was using the telephone , the victim came up behind him .
While Escamilla was using the telephone , the victim tried to touch Escamilla 's scrotum , causing Escamilla to react violently by picking up a kitchen knife and stabbing the man in his neck .
While Escamilla was using the telephone , the victim came up behind him and tried to touch Escamilla 's scrotum , causing Escamilla to react violently by picking up a kitchen knife and stabbing the man in his neck .