Captain's log - Stardate 2261.773

Spock enlisted Sulu's assistance in reviewing the security logs, a difficult procedure simply because we had no idea how the biochemical was introduced into McCoy's system or when it occurred. After hours of searching, they have given me the name of the probable person behind this - Ensign Susan Quinn, daughter of Lachlan Quinn, Imperial Ambassador to the Tellun system.

Ensign Quinn is shown clearly pouring some substance on the tray of food just before one of the nurses picks it up to take to McCoy. Time for her to answer my questions.