Skilled Bug Investigation Illustrated - Cause of the problem

In a presentation titled Skilled Testers and Their Enemies, James Bach identifies the steps involved in skilled bug investigation:



The following post is part of a 13-part series illustrating those points using A Study in Scarlet by Arthur Conan Doyle.




What might be causing the problem?

Lestrade and Gregson glanced at each other with an incredulous smile.

“If this man was murdered, how was it done?” asked the former.

“Poison,” said Sherlock Holmes curtly, and strode off.