Rhyme stared after her then turned slowly, the motor of his chair uttering a soft whine, and gazed at the challenging whiteboards.
 
 CRIME SCENE: 390 E. 35TH STREET, MANHATTAN (SITE OF ARSON)
 
 - Offense: Arson/homicide.
 
 - Victim: Abraham Benkoff, 58, account director advertising agency, well known.
 
 - COD: Burns/hemorrhaging.
 
 - Means of death:
 
 - Gas leak from CookSmart Deluxe range, equipped with DataWise5000 controller.
 
 - No accelerant.
 
 - Additional elements of profile of suspect: - Dark clothes, baseball cap.
 
 - Observing scene to make sure only adult victim killed?
 
 - Another message from the People's Guardian.
 
 - Again playing down intelligence.
 
 CRIME SCENE: 388 E. 35TH STREET, MANHATTAN (SITE OF UNSUB'S SURVEILLANCE)
 
 - Evidence:
 
 - Shards of glass. Window glass, old.
 
 - Xylene, toluene, iron oxide, amorphous silica, dioctyl phthalate and talc (glazing compound).
 
 - His profession? Probably not.
 
 - Paper towel fibers.
 
 - Ammonia.
 
 - Rubber fragments.
 
 - Diesel fuel.
 
 - Two soil samples, indigenous to shoreline.
 
 - Connecticut or Westchester County or New Jersey.
 
 - Soda, differing dilutions, several sources.
 
 - White wine, high sugar content. Typical of inexpensive sparkling white wine.
 
 Archer too was studying the writing carefully. "Mor
 
 e questions than answers," she muttered.
 
 Welcome to the world of forensics, Lincoln Rhyme thought.
 
 CHAPTER 29
 
 Sweeney Todd, now, that was a challenge.