| Item | Count | Percent |
| Total | 21 | 100.0 |
| Weak or insufficient admissible evidence | 7 | 33.3 |
| Lack of evidence of criminal intent | 5 | 23.8 |
| Agency request | 1 | 4.8 |
| Civil, admin or other disciplinary alternatives | 1 | 4.8 |
| Minimal federal interest or no deterrent value | 1 | 4.8 |
| Suspect to be prosecuted by other authorities | 1 | 4.8 |
| All other | 5 | 23.8 |