The secret of Captives' Cave — Mary Collins Dunne

When his father dies after being convicted of a hit-and-run felony, Dennis, his mother, and sister move back to the old Shandonay estate in Virginia. There Dennis picks up yet another burden of ancestral guilt when he learns that his late uncle, the town newspaper publisher, was a notorious local bigot and, worse, that black activists at a nearby college have stirred up the memory of Simon Shandonay, a slave catcher supposed to have chained his prisoners in a cave on the family property.