A guy threatened to shoot my dogs

2 years ago a buddy of mine got his hog dog shot and the man called him and told him he shot the dog. They met up in town and he thru the dog on the Walmart parking lot. My friend got the liscense plate number and tracked him down and took him to court. He asked me to go as a witness and we lost the case. The man lied and said the dogs were chasing cows and we had these dogs 100% cow broke. The dogs were running a hog at the time of the shooting but it was his word against my buddies word. My buddy video taped the dogs walking around the cows and the cows actually chased the dogs and the dogs dodged the cows. tHe judge threw out the case because she said the dogs should of been leashed anyway. The man did admit that maybe the dogs weren't running the cows. I think we could have won if it was trial by jury.