Yes,I agree.Your local Police (I don't know where you are ?) must be total rubbish if they don't even know the law regarding dogs roaming the streets....perhaps one of them is the owner,or a relative,or something? ...it all sounds very fishy to me! Anyway, I would sue the owner AND the Police,and if I saw an unsupervised dog running around outside my house,biting people,I would persuade it to desist with my nice new "Draper" garden spade.
       Oh yes,and my partner,Wild Flying Dove,has two dogs,a Poodle and a Hovercraft ( or it sounds like that),and they're both delightful ! (so is she!!). Get well soon-----meanwhile,I will track down some left-handed toilet -tissue for you.