Kenji, Hans and the rest of the AD Police track Fletcher during an exchange in the Genom building.  When Fletcher heads into restricted areas, the AD Police can't follow.  While there Hans sees Yuki and tries to follow her but can't when she enters a restricted area also.  This leads to Hans having questions about her and himself.  Later, after Fletcher escapes, the AD Police are able to run tests on some of his blood and find that he is a Boomer.