
Warning: Some content is categorised as NC-17 for graphic descriptions of violence and details regarding the mind and behaviour of serial killers.

| On your six | Military parlance for watching someone’s back in a potentially dangerous situation. |
| BAU | Behavioural Analysis Unit, Federal Bureau of Investigation, Quantico, Virginia. Originally the Behavioural Sciences Unit, formed in the 1950s. |
| Wayne Williams, John Wayne Gacy, Elmer Wayne Henley, Dean Allen Corll, Jeffrey Dahmer | The men responsible for – in order – the Atlanta Child murders (21 victims), Chicago’s serial killer in the 1970s, Elmer Wayne Henry and Dean Allen Corll were partners and responsible for 27 murders in the Houston, Texas area in the early 1970s (Reagan has a personal connection to that particular series of murders), and the 1990s killer who cannibalised many of his victims. |
| Douglas and Olshaker | Criminal profiling is used primarily by behavioural scientists and the police to narrow down an investigation to those suspects who possess certain behavioural and personality features that are revealed by the way a crime was committed ("behaviour reflects personality"; Douglas, J.E., Olshaker, M.). http://www.criminalprofiling.ch/introduction.html |
| Skin in the game | A term coined by Warren Buffett to refer to the situation in which high-ranking insiders use their own money to buy stock in the company they are running. Colloquially and in this instance, it means one has to be committed to the process and the group, and not just stand on the sidelines and toss advice about …you have to be totally invested. |