LOS ANGELES—Elon Musk is going on trial for some tweets he made in a defamation lawsuit pitting the billionaire against a British diver he’s accused of branding a pedophile.
The Tesla CEO is expected to testify early in the case to explain what he meant when he called Vernon Unsworth, who helped rescue youth soccer players trapped underwater in a Thailand cave, “pedo guy” in a Twitter spat last year.