| Item | Count | Percent |
| Total | 305 | 100.0 |
| Lack of investigative or prosecutive resources | 203 | 66.6 |
| Lack of evidence of criminal intent | 34 | 11.1 |
| Suspect to be prosecuted by other authorities | 10 | 3.3 |
| Agency request | 6 | 2.0 |
| Weak or insufficient admissible evidence | 3 | 1.0 |
| All other | 49 | 16.1 |