Dr. Logan Nelson foi a pessoa que rotulou erroneamente os raios X do câncer de John Kramer. Devido a isso, a condição de John não foi diagnosticada e quando isso aconteceu, foi tarde demais. Então, o Dr. Logan não era inocente.
No entanto, João mostrou-lhe misericórdia e salvou-o quando o Dr. Logan ficou gravemente ferido.
Apparently, Logan was once a hospital orderly who accidentally mislabeled John's medical X-rays, thereby preventing him from getting timely treatment for his fatal brain tumor.
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Nelson (a former Iraq War medic turned doctor) was actually the man responsible for first mislabeling John Kramer's cancer X-Rays, which led to Kramer's condition not being diagnosed until it was too late. Kramer abducted Nelson and made him a player in his very first prototype game; however, when Nelson was severely injured, Kramer decided to show him mercy (more on that later). As a man dealing with PTSD form his time as a POW, Nelson was a prime candidate to fall under sway of Kramer's brainwashing.