I have learned here in Florida that the animal control center which is a block north of me, releases the animals immediately. I used to take all the critters I captured in live traps there. Until one day, they took the trap with the racoon in it, walked through the door where I thought was where they kept them until they relocated them....boy was I wrong. I walked outside and I saw him carrying the cage out the back door and released the animal, which was basically my backyard.
When I asked them about that they advised me, that they don't relocate the animals they just let them go, so whomever brings animals to animal control they release them in my backyard. Which explains why I kept getting opposum and racoons in my yard. So long story short, invest in a live trap and either shoot them or drown them. Who knows if they are rabid and I don't wait around to find out.
Hope this helps... Happy New Year!!!