| Business | Phone |
| Ariel Investigations La Verne 91750 | (909) 592-3200 |
| Certified Investigation 3530 Damien Ave, La Verne 91750 | (909) 392-9949 |
| Certified Investigation Svc 3530 Damien Ave # 80, La Verne 91750 | (909) 592-1023 |
| Shield Investgators 6843 Canterwood Rd, La Verne 91750 | (909) 392-2238 |
| Whiteaker Investigations 1407 Foothill Blvd Pmb 303, La Verne 91750 | (909) 944-9620 |