Very sorry to hear about this Ed.
I hate it when owners are irresponsible. At my girlfriend's parents place (out in the middle of the woods in Olympia) some of her distant neighbors let their dogs run wild, no fences, not tied up or anything. To make matters worse one of their dogs is VERY aggressive and likes to wander around the surrounding properties. It has attacked other dogs as well and a jogger apparently had to pepper spray it as it tried to bite him. When the owner was approached about all this the response was "Well, it ain't my problem"

I guess that shouldn't surprise me, being it as these are the same people that have more rusted out / dead cars on their property than functioning ones and they burn their garbage instead of paying for removal service. People that let dogs that are aggressive (regardless of the breed) be unrestrained do not deserve to own pets!
What neighborhood of Seattle do you live in, Ed? I'm amazed that the owner let that aggressive dog just relax in the front yard without being chained up or anything. Regardless of it attacking anyone or anything, aren't they worried about the dog getting hit by a car??