Investigation
Part of speech: noun
Definition: The act of investigating; the process of inquiring into or following up; research; study; inquiry, esp. patient or thorough inquiry or examination; as, the investigations of the philosopher and the mathematician; the investigations of the judge, the moralist.
Example sentence: Without a beat officer system, there can be no crime prevention or supportive investigation. This is the very foundation of sound policing. It is the beat officer who connects with the common man on a daily basis and is the five senses of his area.
Investigating
Part of speech: verb
Definition: To inquire into or study in order to ascertain facts or information.
Example sentence: Science isn't just for guys in lab coats, you know? It's for anybody who wants to do a good job of understanding and investigating the world.