| Accident investigation org. |
| Accident investigation gp. |
| Accident investigation site |
| Accident investigation agcy. |
| Adjuster's investigation |
| ___ Commission (corruption investigation at which Frank Serpico testified) |
| X-Files "investigations |
| Of scientists involved in legal investigations |
| Internal investigation? |
| Investigations |
| Police investigation of a betting house? |
| Arson investigation evidence |
| Dreaded IRS investigation |
| Pre-employment investigation |
| Dead-ended investigations |
| Investigation discoveries |
| Investigation by the IRS |
| IRS investigation |
| Start of a news item about a drug investigation? |
| Arkansas real estate group under scrutiny in the Whitewater investigations |
| OPEC investigation? |
| Crash investigation org. |
| Target of a 1989 E.P.A. investigation |
| Investigation of one person after another? |
| Grp. that launches investigations |
| Makes thorough investigations |
| Aspect of a crime investigation |
| Investigation culmination |
| FBI investigations |
| Org. that does investigations |