Caroline Kennedy, daughter of former President John F. Kennedy, warned senators of her “predator” cousin ahead of his first confirmation hearing on Wednesday. In a letter first reported by The Washington Post, she wrote that his victims included family members and parents of sick children.

If approved, Kennedy will control a $1.7 trillion agency that oversees food and hospital inspections, hundreds of health clinics, vaccine recommendations and health insurance for roughly half the country.

The hearing, which began at 10 a.m., will examine the worthiness of RFK Jr. to be Secretary of Health and Human Services. Watch the RFK Jr. confirmation hearing live on C-SPAN (Optimum channel 80, Spectrum channel 49).