As long they remain on paper all's well. ;-) Sherlock always looks forward in solving a serial killer with a dance of happiness and a broad grin of excitement while clapping hands like a 5 year-old child. XD
@Lata, if you need some clues of a clever thought murder check out "Monster". It is interesting with suspence, mystery, psychology and intelligence. You need to remember things and think how the characters think, aside just watching it.