There was a lengthy silence. I could tell that Parminder was debating whether or not to tell me something. I was just about to remind her again of the debt she owed me when she reached a decision. "Forensics found something interesting during the autopsy of Rosalita Ramirez," she began carefully. "Tiny fragments of black volcanic glass—obsidian—in the wounds. The murder weapon was tipped with stone that splintered when it struck bone."