An officer should begin taking notes when witnesses have been identified.
when arriving at the crime scene.
as soon as a photographer arrives.
after the crime scene has been investigated.

so you come to the correct conclusions and make the right decision based on good judgment and a clear mind and valid thought processes behind it, and not just hasty thinking and recklessness.

explanation:

hey love i hoped this if it didn't let me know. you so much and have a wonderful day : ) keep doing the very best you can and never give up you can do it