| Business | Phone |
| Apple Valley Investigations 20 E Piccadilly St 13, Winchester 22601 | (540) 665-3886 |
| Financial Investigative Svc 120 N Braddock St, Winchester 22601 | (540) 667-2669 |
| Full Service Private Invstgtrs 136 S Cameron St, Winchester 22601 | (540) 667-9336 |
| Tri County Private Invstgtn Po Box 1492, Winchester 22604 | (540) 722-3701 |