| Item | Count | Percent |
| Total | 20 | 100.0 |
| Weak or insufficient admissible evidence | 7 | 35.0 |
| Suspect to be prosecuted by other authorities | 5 | 25.0 |
| No federal offense evident | 3 | 15.0 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 3 | 15.0 |
| Agency request | 1 | 5.0 |
| All other | 1 | 5.0 |