Uber Technologies Inc.’s settlement of Waymo’s trade-secrets lawsuit in February left a key piece unresolved: the role played by Anthony Levandowski, the engineer at the center of the alleged theft of critical self-driving technology.

Uber Technologies Inc. settled the high-stakes trade-secret theft lawsuit brought by Waymo, resolving a conflict that already cost the ride-hailing giant its top driverless car engineer and threatened to further embarrass the company.

An Uber Technologies Inc. security manager who was paid $4.5 million over his termination was derided by one of the company’s top internal lawyers as a thief and “extortionist” who made “fantastical” allegations of unethical conduct inside the company.

An Uber Technologies Inc. whistleblower made explosive allegations that a company team stole trade secrets to gain an edge over rivals, prompting a judge to further delay the ride-hailing company’s trial with Waymo.

Waymo was dealt a fresh setback in its fight with Uber Technologies Inc. with a series of unfavorable rulings ahead of a high-stakes trial next month over driverless technology.

Uber Technologies Inc. hired an engineer to lead its driverless car program last year even after its own research revealed red flags about how much proprietary information he took from his former employer, Waymo.

Uber Technologies Inc. said it didn’t know about the alleged theft of proprietary information from Alphabet Inc.’s autonomous driving unit by an executive until Waymo filed a lawsuit in February.

Uber Technologies Inc. threatened to fire the man at the center of its legal battle with Alphabet Inc., telling its top driverless technology engineer, Anthony Levandowski, to either deny taking files from his former employer or turn them over.