finally tonight, the holiday gesture inspiring america from a boy in florida to the police now they re trying to find him to say thanks kerry sanders is on the case reporter: police in this florida city are tonight on the hunt for a pint-sized person of interest their only clue, this letter written in pencil to hollywood police department. thank you for your service. from my piggy bank to you. enclosed $10 and one useful clue. the letter is signed william s. hernandez he s now wanted for kindness what can we do? can we send some patches? can we send some hpd gear they re like, no, that s the problem there is no return address. reporter: are the detectives using handwriting analysis. oh, gosh.