Consider the following accident scenario:

Two workers were assigned to replace a water valve located in an underground concrete vault. After removing the manhole cover, worker #1 climbed down the ladder into the vault. Worker #1 collapsed and became unconscious within seconds of reaching the bottom. Worker #2 went down the ladder to rescue worker #1 but was quickly overcome by the lack of oxygen. Both workers died at the bottom of the vault. Worker #3 stayed outside the vault and called for emergency response after worker #2 collapsed.

Applying the "four P" evidence concept (physical, paper, people, and photographic), discuss the evidence related to the accident that you would want to collect. Explain the reasons for your choices.

Your response must be at least 500 words in length