Okay guys, i have a couple questions for you. I live in denver and there is this dog park right across the street from me. So Saddie and I go there about twice a day. Well there is a sign posted stating that aggressive dogs are not allowed in. There is this guy that brings in two dogs.. one is a female doberman who is a sweet heart. The other is a German Sheppard.. that is from Germany.. this is the problem dog. The dog has attacked two dogs 1 chi and one wiener dog. Both were bitting so badly that the owners had to carry it out with blood running down the owners shirt while the dog was limp in his arms. The owner of the GS just laughed and said its a dog park what do you expect. Well one of the other owners asked politely for the guy to leave since his dog is aggressive. The GS owner threw sand in the nice guys face and his GS is attacked trained. So the nice guy called the cops and the cops heard the GS owner threaten for his dog to attack if he didnt get off of the phone. So needless to say the cops came and arrested him.. impounded the dogs.. well he got out two days later with the dogs.. so the nice owner has a Temporary Restraining Order against him.. the guy is not allowed within 100 feet of the park. well the guy is still coming to the park.. and the GS does not have a muzzle on and Saddie went up and sniffed the dogs face and the dog bite her.(nothing to serious). So i called the cops and explained the situation. So the cops came again.. and instead of going to talk to him they decided to yell at me.. for calling them (nice huh?). So today i took saddie to the dog park and that same guy came.. the GS had a muzzle on him. Well he figured who called the cops last time.. so he walked up to me stuck out his hand and was like Hi im kurt you must be saddie.. I looked him right in the eye and said no my name is Bri.. i didnt shake his hand or anything. So he went away to the other end of the park(ps our park is 1/4 long) and was talking to another dog owner.. about me. so the GS is out there pinning dogs left and right.. and the dogs are squeelings.. not something they have ever done before. Well his German Sheppard came up to mine.. mine got behind me.. with about 4 other pups and there owners.. and came forward to smell them.. well i blocked him he would move left i would move left blocking his path to my dog. The GS looked at me and showed his teeth threw his muzzle and growled at me.. and locked eyes with him and backed him down. Then the guy comes over and keeps his dog next to mine.. saddie is buried under the bench trying to get away from the GS. The owner is trying to intimidate me and i wont have it. I grew up with attack trained dogs.. i know what to do. Any suggestions since the police wont do anything..and we cant ban him since its a public place? please help if that attack dog goes after mine... and hurts her.. ill snap its neck. I am not afraid of the dog.. but i dont want to do that if it comes down to it.. Any info would be great.. ps animal control wont even come out when we call.