Joe Biden’s son Hunter was arrested on Jersey Shore drug charges in 1988 and had his record expunged at a time when his father was pushing for the incarceration of drug offenders drawn disproportionately from minority groups.

Congressional records reveal that Hunter Biden, now 49, was arrested in Stone Harbor, New Jersey, where the Biden family has often holidayed over the years, in June 1988. Hunter Biden, then 18, had just graduated from the prestigious Archmere Academy prep school, which his father had also attended. The former vice president and his wife Jill have often been spotted on trips to Stone Harbor.

The arrest has not previously been reported. Republicans have recently highlighted Hunter Biden’s drug abuse, questioning why it was not taken into account when the lobbyist was appointed to a $50,000-a-month post on the board of the Ukraine oil company Burisma in 2014, when his father, as vice president, was the Obama administration’s lead official on Ukraine.