Parallel construction came to widespread public notice after the Snowden disclosures, which showed how the NSA was (for example) secretly wiretapping all the information transiting between Google's data centers, then telling the FBI what information to go and get a warrant for.
parallel construction looks at the way that the war on drugs supercharged the practice, with the DEA leading the charge to cover up illegal spying with bizarre antics like fake car-thefts that let agents search the car after it was recovered.
Indeed, it is a long-standing U.S. policy @v4vapid