In April 2016, at the height of the deadliest drug epidemic in U.S. history, Congress effectively stripped the Drug Enforcement Administration of its most potent weapon against large drug companies suspected of spilling prescription narcotics onto the nation's streets. By then, the opioid war had claimed 200,000 lives. Overdose deaths continue to rise. A handful of members of Congress, allied with the nation's major drug distributors, prevailed upon the DEA and the Justice Department to agree to a more industry-friendly law. The new law makes it virtually impossible for the DEA to freeze suspicious narcotic shipments from the companies, according to internal agency and Justice Department documents and an independent assessment. Political action committees representing the industry contributed at least $1.5 million to the 23 lawmakers who sponsored or co-sponsored four versions of the bill. "The drug industry, the manufacturers, wholesalers, distributors and chain drugstores, have an influence over Congress that has never been seen before," said Joseph T. Rannazzisi, who ran the DEA's division responsible for regulating the drug industry and led a decade-long campaign of aggressive enforcement until he was forced out of the agency in 2015. "I mean, to get Congress to pass a bill to protect their interests in the height of an opioid epidemic just shows me how much influence they have." The DEA and Justice Department have denied or delayed more than a dozen requests filed by The Post and "60 Minutes" under the Freedom of Information Act for public records that might shed additional light on the matter.