Forensic scientist Joseph Scott Morgan started with the soil.
Roughly ten inches were dug out of the shooting scene days after it happened.
Once you do that, nobody can ever go back and check it again.
He expects investigators to point to digital scans accurate to the millimeter, and he allows that might be enough.
Then he named Parkland, where the building stayed fenced and locked for years so a jury could walk through a scene frozen exactly as it was found.
Tell twelve ordinary people the ground was dug up within days and it sticks.
On the multiple DNA profiles found on the rifle, he was careful.
Modern testing picks up skin cells, so a weapon that passed through several hands over years can carry people who were never near the crime.
Prosecutors will have to explain every one of them. He shut the door on the exploding microphone theory outright.
He has seen what explosives do to a body, and this looks nothing like it.
Then the gap he cannot explain.
DNA analysts and crime scene staff testified at the preliminary hearing.
The medical examiner filed paperwork and was never called.
And nobody has said what happened to the clothing, or how fast anyone reached the emergency room.
@JoScottForensic
