| Item | Count | Percent |
| Total | 21 | 100.0 |
| Weak or insufficient admissible evidence | 10 | 47.6 |
| Lack of evidence of criminal intent | 3 | 14.3 |
| Civil, admin or other disciplinary alternatives | 2 | 9.5 |
| No federal offense evident | 2 | 9.5 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 2 | 9.5 |
| Suspect to be prosecuted by other authorities | 1 | 4.8 |
| All other | 1 | 4.8 |