| Item | Count | Percent |
| Total | 22 | 100.0 |
| Weak or insufficient admissible evidence | 8 | 36.4 |
| Suspect to be prosecuted by other authorities | 6 | 27.3 |
| Agency request | 5 | 22.7 |
| No federal offense evident | 2 | 9.1 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 1 | 4.5 |