Related Clues:
- Dig — investigate
- Dig — rummage
- Search for information
- Probe, with "into"
- Go deeply (into)
- Research into sixth president and first lady over law
- Research intensively (into something)
- Evaluate (possibility)
- Rummage deep (in)
- Leaders of life-saving volunteers go into river and probe deeply
- Intensively research (into something)
- Look closely (into)
- Conduct an exhaustive probe
- Research (into)
- Investigate, with ''into''