Gail Harding was a personal intern of Rachel Priest. She sported dark green eyes, and shoulder length brunette hair which had a pink flower headband on it. She wore a pair of red glasses, wore green eyeshadow and red lipstick, and donned a light yellow top underneath a red dress with white trimming.
Gail was found encased in solid concrete in a construction site. Before beginning the autopsy, Nathan had to use a hammer and chisel to get Gail's body out of the concrete. Later, after the autopsy was completed, Nathan told Jones and the player that Gail had to be partying before her death, since there were high amounts of cocaine, alcohol, etc, found in her stomach, which was enough to make the victim fall unconscious from overdose. However, Gail actually died because of being poured in concrete while she was still unconscious. When asked what clues he discovered from the killer, Nathan said that he found nothing, but gave the team some concrete rubble for examination.
After examining the concrete rubble, the team found some molecules of taurine about which Jones had no clue. So they asked Grace about it, who told the team that taurines are used in energy drinks, which revealed that the killer used to drink energy drinks. It was also revealed that the killer used cocaine after Grace analyzed the powder specks found in the concrete mixer (the murder weapon).
Killer and motives
Irina killed Gail to "protect" Derek's company. Irina was drunk when she found Gail unconscious (because of overdose) in the construction site. She thought that Gail was dead and encased the victim in solid concrete so that the body could not be found. Irina did this because she thought that Gail's death would give Derek's company a bad image since the victim was an employee of Derek, and as a result, she hid Gail's body in solid concrete. She did not want to jeopardize Derek's company, which the two of them had built with a lot of hard work.
- It is possible to deduce that she weighed 180 lbs when killed, because the 140 lbs of her killer plus her own weight equals 320 lbs.
- Gail bears a striking resemblance to Penelope Garcia from Criminal Minds.