If you'd like to take a look at the kind of dog the van Dams had, and read some information about that particular breed, click here.
Here is a snippet--
Happy, loving cheerful, affectionate and very rambunctious. Intelligent, but can be highly opinionated and willful, therefore this breed should have firm, experienced training from the start. Quick to learn, but resistant to repetitive training. Reserved with strangers and sometimes combative with other dogs. Socialize them well at an early age. Protective on his own territory. Very brave and loyal, it has a strong prey instinct. Do not trust with small non-canine animals. This is definitely not a herding or farm dog. The Weimaraner needs to live indoors as a member of the family. He needs attention and companionship. If relegated to a kennel life or if left alone too much, he can become very destructive and restless (*Miz wonders: like tearing up his bed?). He is a natural protector. (*Miz wonders: so why didn't he protect Danielle? Could it be because one of his owners was in on the deal?) Weimaraners are often kind to children, but are not recommend for very young ones because they are energetic enough to accidentally knock a child down. This breed likes to bark. Very hardy, with a good sense of smell, and a passionate worker, the Weimaraner can be used for all kinds of hunting.
This info raises a lot of questions about that night, in my opinion.