Maria Margosian (Danielle Burgio) is a villainess from "Seven Feet Under", episode 6.09 of Crossing Jordan (airdate March 21, 2007). She was an employee at the Boston Metropolitan Museum and a relative of Eric Margosian, who worked at Saint Adrian's Hospital (with their relationship to each other being left unrevealed).
The two were revealed to be greedy thieves, as they had previously stolen a mummy from the museum and sold it. To replace the stolen mummy, Maria and Eric mummified the corpse of Kimberly Wannamaker, a homeless woman who had died of hypothermia, that Eric stole from Saint Adrian's.
The Margosians' scheme was uncovered when the "mummy" was brought into the morgue by Dr. Kate Switzer. Kate believed the mummified body to be that of Naeema (daughter of Ramses the Second) and hoped examining her body would prove she was killed by her brother and not a Hittite slave as history claimed she was. But the mummy was revealed to be someone who died much more recently when a dental scan discovered a polythyleneglycol diacrylate filling, as diacrylates hadn't been used in dentistry until 2003.
After identifying the body as that of Kimberly Wannamaker and seeing how she had died at Saint Adrian's, detective Woody Hoyt did a search of hospital employees authorized to releases bodies on the night of Kimberly's death and recognized Eric as having the same last name as Maria (having seen her name on a list of museum employees). Realizing their connection to the scam, Woody brought Maria and Eric in for questioning and confronted them about their callous actions. Against Eric's insistence on staying quiet, Maria confessed, defending herself by insisting that Kimberly was dead when she was mummified. Maria and Eric were presumably arrested for their greedy plot.