By way of introduction, we wish to discuss a cautionary tale of how well-meaning intentions and an incorrect hypothesis can become interwoven into the fabric of ethical standards in forensic investigations. This tale does not imply that ethical standards were or have been compromised because such standards are moot with respect to the tale. We wish to use the tale to simply delineate facts from conjectures and show what science and engineering can prove or disprove. It also indicates that some facts cannot be conclusively proven at all times and in all instances. Rather, it is an example of how intense assertions or misguided or unproven beliefs can cloud judgment leading to incorrect beliefs or conclusions. In a strict sense, what we wish to describe is not a forensic engineering ethical failure, although it involves forensic engineering. The story involves documented events, witness statements, physical evidence, conjectures, unproven claims, and some sophisticated engineering conducted by the leading laboratory in explosions in the United States. Hopefully, this account will help set the stage for the theme of the book relative to the adherence to ethical standards.