A top Uber lawyer struggled to explain to a federal judge why the company reached a $7.5 million settlement with a former employee who accused it of stealing its rivals' trade secrets, even though Uber considered the allegations a bogus attempt at blackmail. The effort did little to clear up the latest dark cloud hanging over the ride-hailing service. Uber is struggling to defend itself in a high-profile lawsuit alleging that it has been building a fleet of self-driving cars with technology stolen from Waymo, a Google spinoff. The trial in that case was set to begin next week, but U.S. District Judge William Alsup postponed it until February 5 after learning about a 37-page letter sent to Uber lawyer Angela Padilla by a former Uber security manager and his lawyer. The letter included accusations of intellectual thievery and other shady behavior that have reshaped the Waymo case. Although the May 5 letter included allegations that Uber had stolen some of Waymo's trade secrets, Padilla didn't share it with any of the lawyers involved in the case. That has incensed Alsup, who maintains that the letter is a key piece of evidence, even though its allegations remain unproven.

"On the surface, it looked like you covered this up," Alsup scolded Padilla. "For reasons that, to me, are somehow inexplicable."

Padilla testified in a Wednesday court hearing that she sent the letter to the U.S. Justice Department in an attempt to deflate the "extortionist" claims of Richard Jacobs, who was Uber's manager of global intelligence until seven months ago. Jacobs' allegations are now part of a Justice Department investigation into whether Uber has been breaking U.S. laws as it emerged as the world's leading ride-hailing service. Despite Uber's belief that Jacobs simply was making up a story in an attempt to milk the company, it paid $4.5 million to Jacobs and $3 million to Clayton Halunen, the Minneapolis lawyer who wrote the explosive letter. Jacobs' chunk of the money includes a one-year stint as a Uber consultant that will pay him $1 million through August. That settlement prompted a Waymo lawyer to ask Padilla: "Does Uber pay money to extortionists?" Padilla responded, "We try not to."

The revelation about the Jacobs settlement probably couldn't come at a worse time for Uber, which has already been trying to clean up the damage done in a corporate culture that fostered rampant sexual harassment , technology used to dupe regulators and a yearlong cover-up of a hacking attack that heisted the personal information of 57 million riders and 600,000 drivers.

Uber paid a $100,000 ransom to keep the hacking attack under wraps, a tactic that has irked several U.S. lawmakers and that now threatens to get the company into more legal trouble. During her testimony, Padilla said Uber reluctantly paid Jacobs and Halunen to avoid distractions, protect the safety of overseas employees and avoid the costs of a lawsuit. The explanation didn't seem to persuade Alsup, who will be presiding over the jury trial.

"People don't pay that kind of money for BS and they certainly don't hire them as consultants," the judge said.