Investigators are zeroing in on the cause of the deadly Black Forest Fire near Colorado Springs. Ryan Warner talks to Brenda Schultz, one of the investigators on the case. She's a special agent with the U.S. Forest Service. She can’t talk about an open investigation, but she’s helped crack the case on some of Colorado’s other big wildfires. She says it’s as much a mental challenge as a forensic one.

[Photos: Brenda Schultz]