| Item | Count | Percent |
| Total | 41 | 100.0 |
| Weak or insufficient admissible evidence | 15 | 36.6 |
| Lack of investigative or prosecutive resources | 7 | 17.1 |
| No federal offense evident | 5 | 12.2 |
| Suspect to be prosecuted by other authorities | 4 | 9.8 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 1 | 2.4 |
| All other | 9 | 22.0 |