What is the stair tool in investigation​

Investigation. As you proceed through the STAIR tool, the process of Analysis and Investigation can become somewhat circular, as the investigation reveals new information, and new information is analyzed to confirm, disprove, or modify the theories of suspects and events that you are considering.

Explanation:

the process of Analysis and Investigation can become somewhat circular, as the investigation reveals new information, and new information is analyzed to confirm, disprove, or modify the theories of suspects and events that you are considering.

keep quite, set up,sorry

counter-terrorism incorporates the practice, military tactics, techniques, and strategy that government, military, law enforcement, business, and intelligence agencies use to combat or prevent terrorism.

basically prevent, pursue, protect, and prepare, google it if you need more info