The word and its meaning have been publicized by defense attorney Alan Dershowitz, notably in a 1994 New York Times article, "Accomplices to Perjury," in which he said:
There seems to be little doubt that the practice occurs, is not limited to any region of the country, and that "testilying" is a common name for it. A 2003 Boston Globe editorial noted:
The LAPD is said to call the practice "joining the liars' club." In a 1996 article in the Los Angeles Times, "Has the Drug War Created an Officer Liars' Club?," Joseph D. McNamara, then chief of police of San Jose, said "Not many people took defense attorney Alan M. Dershowitz seriously when he charged that Los Angeles cops are taught to lie at the birth of their careers at the Police Academy. But as someone who spent 35 years wearing a police uniform, I've come to believe that hundreds of thousands of law-enforcement officers commit felony perjury every year testifying about drug arrests." He noted that "Within the last few years, police departments in Los Angeles, Boston, New Orleans, San Francisco, Denver, New York and in other large cities have suffered scandals involving police personnel lying under oath about drug evidence."
The extent of the practice is hotly debated. Rank and file policemen, police advocates and police unions acknowledge that it does occur but deny that it is widespread or systemic. In 1995, the Boston Globe reported that New York Police Commissioner William J. Bratton created a furor when he said he agreed with most of what Dershowitz had to say. The Globe quoted Richard Bradley, president of the Boston Police Patrolmen's Association: "I find it incredible that he would say that. Every day all over the country, police officers are testifying. Everyone realizes they are testifying under oath. If this was this much a problem, it would have come to light over the years." Bradley said that in 27 years on the Boston force he had never encountered the practice.