The role he found most interesting, and the one that had the greatest long-term impact on law and practice, was his membership of the interdepartmental committee on the treatment of offenders with mental disorders, chaired by the veteran Conservative politician Lord Richard Butlerer.
"[It] could have a detrimental impact on law enforcement, security and intelligence agency access to communications data and lawful intercept," states the letter.
His epoch-making impact on law, public discourse, and culture is all the more stunning when one considers that he was a private citizen who never ran for public office and never held any official role within government.
"We saw a cheap booze free-for-all, justified on the argument that it was good for growth, with little thought about the impact on law and order.
One brief, filed in 2006, stated that the court's decision would have "a profound impact" on law enforcement officers in California.
In a victory for the home secretary, who warned that Javid's plans "could have a detrimental impact on law enforcement", the culture secretary announced a voluntary deal with Britain's mobile phone firms to improve coverage.
Set in motion by the arrest of a shaggy derelict who has urinated on the mayor's car, it brims with issues like the impact on law enforcement of image-obsessed politicians, the plight of the homeless, the corruption of the police and the politicization of their work, the role of the press for better and worse, guilt, and familial relations.
In the end, a new technology for producing morphine could have a profound impact on law enforcement agencies.
Encryption and other advanced technologies may be used, with direct impact on law enforcement and therefore some restrictions are necessary in the interests of national security.
But many questions remained open, including the sensitive role of race and its impact on law enforcement.
