The House Ethics Committee acts confidentially and typically uses minimalist language to announce whether it is investigating a member of Congress. This makes tracking open cases difficult, but there are 10 cases the committee has previously stated it is reviewing. The committee has no rules compelling it to make a public announcement that a review has been closed, sometimes resulting in a delay in a case's resolution coming to light — though members certainly have an interest in publicizing something that reflects well on them.
Boehner 'Comfortable' With House Ethics Protocols