that i don t know. reporter: i m looking at the handwriting. it s block letters so it is you know, it looks like he really took his time, though because there is a little part where he erased and you could see he wrote over it you could tell he was really trying to make it perfect. reporter: with little to go on, the police have turned to a tried and true technique, social media posts, asking the community to finger william hernandez. so far no luck but reaction online, they are raising that boy right. and then there is this so shines a good deed in a weary world, originally penned by a different william, as this william, a philanthropic fugitive brightens our holiday season kerry sanders, nbc news hollywood, florida. let s hope they all get to meet. that s our broadcast for tonight. take care of yourself and each other take care of yourself and each other good night, everyone
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.