| Item | Count | Percent |
| Total | 18 | 100.0 |
| Lack of evidence of criminal intent | 7 | 38.9 |
| Weak or insufficient admissible evidence | 3 | 16.7 |
| Agency request | 2 | 11.1 |
| Suspect to be prosecuted by other authorities | 2 | 11.1 |
| Lack of investigative or prosecutive resources | 1 | 5.6 |
| All other | 3 | 16.7 |