The penthouse also provides extreme privacy: It is accessible by a private-key elevator that can be reached directly through the parking garage.

WSJ: Many Borough Views From Dumbo

Authorities said Ms. Gillespie, a mother of four adult children, was returning to her Prospect Heights apartment from a shopping trip to the local Key Food on Dec. 17, 2011, when she left the elevator at the fifth floor to find Mr. Isaac standing there.

WSJ: Torch Killer Gets 50 Years

Ms. Gillespie, the mother of four adult children, was returning home from a shopping trip at a nearby Key Food Saturday at around 4 p.m. when she exited the elevator at the fifth floor to find Mr. Isaac standing there, according to her nephew Rickey Causey and police.

WSJ: Handyman Charged in Elevator Arson Death