| Item | Count | Percent |
| Total | 20 | 100.0 |
| Suspect to be prosecuted by other authorities | 6 | 30.0 |
| Lack of evidence of criminal intent | 5 | 25.0 |
| Weak or insufficient admissible evidence | 4 | 20.0 |
| Lack of investigative or prosecutive resources | 2 | 10.0 |
| Agency request | 1 | 5.0 |
| All other | 2 | 10.0 |