David Meehan, whose allegations of abuse at New Hampshire’s youth detention center sparked nearly a dozen arrests and more than a thousand lawsuits, finally took the witness stand Wednesday, seven years after he first told his wife, “They raped me.” Meehan, 42, spent three years at the Youth Development Center, where he alleges he was repeatedly beaten, raped and locked in solitary confinement in the late 1990s. “It’s hard to describe this scared little boy, who at the same time feels safe,” he told jurors as he remembered being handcuffed to a wooden chair during the intake process at YDC.