Christmas Tragedy Update

I have continued to follow the story involving the friends of my sister-in-law. The death toll is at three now and the perpetrator is still free. While the new article is saying that charges are "imminent", I'm still wondering what's taking so long. Not even a traffic violation? It just seems so outrageous to me. How long does it take to get results on bloodwork - taken over a week ago??? I am just really confused and hoping for some justice.