Lisa Gardner Interviews Detective D.D. Warren Lisa Gardner: D.D.--What do you find most fascinating/frustrating about working with the new guy, crime scene expert Alex Wilson? D.D.: Alex seems sharp. Knows his blood spatter--I respect that in a guy. `Course, he's been teaching at the Academy, which is one thing, while we're now standing in a Dorchester home with five dead and carnage in every room. I don't want lectures, I want results. This was a family--according the neighbors, even a nice family who seemed to actually like one another. Until, of course, the father snapped and killed them all. Or did he? These are the kinds of questions I gotta ask, and Prof Alex better be ready to answer. LG: When did you know you were going to have your own novel? D.D.: First time I walked on scene in Alone. Please, I'm five times tougher than fellow detective Bobby Dodge and twenty times smarter. Plus, I look damn good in Jimmy Choos. Let's see the former sniper do my job in my heels, then we'll talk. LG: What's the most difficult case you've ever had to handle? Why? D.D.: These past two family homicides. For one thing, any crime involving kids wrecks you a little. For another...I don't believe in coincidence. Here are two families, totally different neighborhoods, socioeconomics, lifestyles, etc., yet they both wind up the same way, dead. Now,