I read a coworker said the above and some concluded that Mr. Tad Cummins has a narcissistic personality disorder.
“The symptoms of narcissistic personality disorder include: grandiose sense of importance, preoccupation with unlimited success, belief that one is special and unique, exploitative of others, lacks empathy, is arrogant, and is jealous of others.” (Steve Bressert, 2016)
However, workplace devious smear campaign is often attributed to narcissistic people.
“Virtually all smear campaigners can be counted on to have traits of “Cluster B” personality disorders. Narcissists and sociopaths are among the most virulent smear campaigners, and histrionic and borderline people may also opt to smear those who upset them.” (National Domestic Violence Hotline)
Character assassination from past and current coworkers ends up triggering the scrutiny of the person who makes the allegation. If Mr. Tad Cummins and the persons who said the above are still in the same organization and conflict arises, they are all examined for potential narcissistic behavior.