Tesla CEO Elon Musk subpoenas ex-Twitter CEO Jack Dorsey in battle over buyout

Elon Musk subpoenaed Jack Dorsey, co-founder of Twitter Inc. and his longtime friend, in his defense against the social media company’s lawsuit to make him complete his proposed $44 billion buyout. Dorsey, who stepped down as Twitter’s chief executive officer last year, has been an energetic booster of Musk’s bid for the company, tweeting in April that Musk was the “singular solution I trust” to take over. The subpoena follows a pair filed Friday for Kayvon Beykpour, former head of consumer product at Twitter, and Bruce Falck, formerly in charge of revenue product.