Mercerwood

The Mercerwood is the apartment complex where Mandy and her boyfriend, Gary, live during Day 4.

When Richard Heller reveals that he went home with Mandy and Gary the week before the terrorist attacks, he explains that Mandy must have used his cell phone when he wasn't paying attention. CTU contacts cab companies and is able to track down the cab driver who drove Mandy and Gary back to The Mercerwood after leaving Richard's apartment.

Jack and a SWAT team, including Tony and Lee Castle, arrive at the complex to apprehend Mandy and Gary. Mandy realizes that CTU has found them, so she kills Gary and takes Tony hostage.

More to be added later (the hostage situation, her neighbors, Mandy's capture)