1. The investigation of criminal activities
   - police investigation

Type of: investigating, investigation

• Chelidonium
• Chelidonium majus
• Chelifer
• Chelifer cancroides
• cheliferous
• cheloid
• Chelone
• Chelone glabra
• Chelonethida
• Chelonia
• Chelonia mydas
• chelonian
• chelonian reptile
• Chelonidae
• Cheloniidae
• Chelsea
• Chelsea tractor
• Chelyabinsk
• Chelydra
• Chelydra serpentina
• Chelydridae
• chem
• chem lab
• Chemakuan
• Chemakum