"Some experts extrapolate far beyond what can be supported," reads a 2009 National Academy of Sciences report about bloodstain pattern analysis. It adds, "The uncertainties associated with bloodstain-pattern analysis are enormous."
Last August, 50-year-old Eric Weil called 911. He had taken in a friend's son who was struggling with opioid addiction. This help was offered on the condition that the young man bring no drugs into the house, but he did. When Weil discovered a packet of white powder in the guest room, he called for help.