Oklahoma County officials voted Wednesday to hire a law firm to sue some of the biggest drug companies in the world.The county is joining more than 50 other cities and counties in Oklahoma getting involved in this type of litigation as a trial over similar lawsuit against Johnson & Johnson nears its end in Cleveland County. The state is asking for $17 billion, and Johnson & Johnson's representatives say the company has done nothing wrong.Both sides made their closing arguments earlier this week, and a judge said it'll take at least a month to come to a decision. Lawyers said the opioid epidemic has cost Oklahoma County tens of millions of dollars, so the county wants its own suit to pay for expenses such as jailing, health care and drug treatment."We can help reduce the cost to the taxpayers of our criminal justice system," Oklahoma County Commissioner Kevin Calvey said. "I'm all about creating value for the taxpayers." Lawyer Alex Yaffe told KOCO 5 that the suit will target big companies such as Purdue Pharmaceuticals and Johnson & Johnson, which are fighting lawsuits all over the country."They have changed a generation or more of society in a bad way, and it's going to take a generation or more to fix this problem," Yaffe said.The law firm Oklahoma County hired will make 15% of any winnings and nothing if they lose. Drug companies in many of the nationwide lawsuits have denied any wrongdoing.Some opioid manufacturers are fighting back, pointing a finger at the Drug Enforcement Administration, claiming it knew about the crisis all along.