The investigation helped to surface the truth about the incident.

To make something visible or apparent, often by revealing or exposing it.
The truth will surface eventually.
New problems surfaced quickly.
His feelings surfaced unexpectedly.
surface the truth
surface a problem
surface an issue
emerge
arise
appear
The whale surfaced for air.

To rise to the top of a body of water or to become visible at the top layer.
The submarine will surface soon.
He surfaced from the water.
The treasure surfaced at last.
surface for air
surface the water
surface to breathe
emerge
appear
arise