| Clue | Source | Date |
|---|---|---|
| Suspicious, informally | New York Times | 28 Apr 2024 |
| Behaving suspiciously | Wall Street Journal | 06 Nov 2021 |
| Behaving suspiciously | Wall Street Journal | 10 Sep 2016 |
| Suspicious | ||
| Suspiciously unusual, in police slang | ||
| Suspiciously unusual, in police slang |