| Item | Count | Percent |
| Total | 79 | 100.0 |
| Weak or insufficient admissible evidence | 42 | 53.2 |
| Suspect being prosecuted on other charges (e.g., UFAPs) | 12 | 15.2 |
| Suspect to be prosecuted by other authorities | 8 | 10.1 |
| Lack of investigative or prosecutive resources | 4 | 5.1 |
| No federal offense evident | 2 | 2.5 |
| Lack of evidence of criminal intent | 1 | 1.3 |
| All other | 10 | 12.7 |