Elon Musk has not been shy about putting much of his life on public display. The tech billionaire posts daily on his social network X, has cooperated with two biographies and often speaks on podcasts and at conferences.

But there is one part of his life that he has not revealed much about — his longtime estrangement from his father, Errol Musk, who has become increasingly outspoken about his family and business ventures tied to the Musk name.

A New York Times investigation found that a significant factor in Elon Musk’s rupture with his father stems from accusations against Errol Musk of child sex abuse. The allegations have repeatedly spilled over into Elon Musk’s life as relatives have contacted him for help and he has sometimes taken action to intercede, according to personal letters, emails and interviews with family members.

The family’s troubles have entangled Elon Musk in a painful three-decade multigenerational saga that continues to trail him. The fallout has kept the 54-year-old mogul tethered to South Africa, where he was born and where Errol Musk lives, even as he has built a business empire in the United States and briefly ascended to political power as a close adviser to President Trump.