| Item | Count | Percent |
| Total | 22 | 100.0 |
| Weak or insufficient admissible evidence | 7 | 31.8 |
| Suspect to be prosecuted by other authorities | 3 | 13.6 |
| Agency request | 2 | 9.1 |
| Lack of evidence of criminal intent | 2 | 9.1 |
| No federal offense evident | 2 | 9.1 |
| Civil, admin or other disciplinary alternatives | 1 | 4.5 |
| Lack of investigative or prosecutive resources | 1 | 4.5 |
| All other | 4 | 18.2 |