Palestinian activist Mahmoud Khalil, whose role in campus protests against Israel led to his detention in immigration jail, is seeking $20 million in damages.

NEW YORK (AP) — On a recent afternoon, Mahmoud Khalil sat in his Manhattan apartment, cradling his 10-week-old son as he thought back to the pre-dawn hours spent pacing a frigid immigration jail in Louisiana, awaiting news of the child’s birth in New York.

For a moment, the outspoken Palestinian activist found himself uncharacteristically speechless.

“I cannot describe the pain of that night,” Khalil said finally, gazing down as the baby, Deen, cooed in his arms. “This is something I will never forgive.”