Ed. Note: Chris Halkides has been kind enough to try to make us lawyers smarter by dumbing down science enough that we have a small chance of understanding how it’s being used to wrongfully convict and, in some cases, execute defendants. Chris graduated from the University of Wisconsin-Madison with a Ph.D. in biochemistry, and teaches biochemistry, organic chemistry, and forensic chemistry at the University of North Carolina, Wilmington.
In 1989, Han Tak Lee and his daughter were staying in a 1000 square foot cabin in Pennsylvania when a fire destroyed it, claiming his daughter’s life. In 1990, Mr. Lee was convicted of first degree murder and arson, and sentenced to life without parole. The evidence against him included identifying one ignition point of the fire by the presence of crazed glass, thin, irregular fractures. The collapsed furniture and bed springs, spill patterns (pour patterns?), and deep charring and alligatoring of wood were also taken as evidence of a very hot fire; therefore a deliberately set fire. Crazed glass is created by cold water hitting hot windowpanes. Nor are collapsed furniture springs, pour patterns, alligator patterns or depth of charring of wood accepted any longer as evidence of arson. Continue reading →