Find out who was shooting | Night 2 Alpha Polaris Guide

After waking from a nightmare go out to the corridor. Talk with not quite conscious Nova. As the sound of the shot came from outside, walk to the station exit. Before leaving the station, take a tranquilizer riffle from the weapon rack on the right.

Try to calm Tully down. After a moment Alisteir Euler joins your conversation. Regardless of dialog options you choose, you will have finally to "sedate" Tully.