sense troll's death

"How long have they been dead?" Murphy asked quietly.
I grunted and hunkered down. I stretched my left hand out over the bones and closed my eyes, focusing my attention on sharpening my senses, mundane and magical alike. Very faintly, I could scent the heavy, bestial stink of a troll. I'd only seen a couple of the big ones from up close, but you could smell the ugly bastards from half a mile away. There was a rotten odor, more like heavy mulch than old meat. And there was more sulfur and brimstone.
Below that, I could feel tremors in the air over the spot, the psychic residue of the troll's violent death. There was a sense of excitement, rage, and then a dull, seldom-felt terror and a rush of sharp, frozen images of violent death, confusion, terror, and searing agony.
My hand flinched back from the phantom sensation of its own accord, and for just a moment the memories of my burning took on tangible form. I hissed through my teeth and held my hand against my stomach, willing the too-real ghost of pain away.
"Harry?" Murphy asked.
What the hell? The impression the death had left was so sharp, so severe, that I had actually gotten bits of the troll's memories. That had never happened to me before. Of course, I had never tried to pick up vibes in the Nevernever, either. It made more sense that the substance of the spirit world would leave a clearer spiritual impression.
"Harry?" Murphy said again, more sharply.
"I'm all right," I said through clenched teeth. The imprint had been more clear than anything I had ever felt in the real world. In Chicago, I would have thought it was only a few seconds old. Here…


Proven Guilty Chapter 37, Page 300