And then, to shouts of joy and a round of applause from onlookers, Mr Liu was hoisted by rescuers onto amakeshift stretcher made from a wooden door covered by a quilt and carried down to safety.
During last year's raid, federal agents found a locked door in the basement, which led to a second door that opened into a dungeon lined with sound-deadening material containing a small makeshift coffin with external locking devices.