| Item | Count | Percent |
| Total | 12 | 100.0 |
| Weak or insufficient admissible evidence | 4 | 33.3 |
| Agency request | 2 | 16.7 |
| Lack of investigative or prosecutive resources | 1 | 8.3 |
| No federal offense evident | 1 | 8.3 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 1 | 8.3 |
| Suspect to be prosecuted by other authorities | 1 | 8.3 |
| All other | 2 | 16.7 |