"He said something about a residential surveillance house," Harper said. "I had no idea what that was."
It was early January 2020. Harper, a 6-foot, 8-inch (203 centimeter) professional basketball player, had arrived in the southern Chinese city of Shenzhen, hoping to land a new contract after playing in Norway, Japan and a host of other countries.
Harper had been in China for less than a week when everything went wrong. Walking back from a comedy show with a friend in the early hours of January 7, he said he saw a violent altercation between a man and a partially clad woman on the street and ran over to help.