<P> Felicia Tilman ( Harriet Sansom Harris ) , Martha 's sister , soon arrives on Wisteria Lane to find out what happened to her sister . While inside Paul and Mary Alice 's house , she recognizes a picture of Mary Alice and claims her to be Angela , a nurse she worked with years prior in Utah , but Paul is adamant that she is mistaken . Felicia , however , knows that Mary Alice was in fact Angela and later tells Zach that she knew him when he was a baby , and that his original name was so lovely : Dana . In the first - season finale , the mystery behind Mary Alice 's suicide is revealed in full . In March 1990 , Todd and Angela Forrest could not conceive and one night a woman named Deirdre Taylor ( Jolie Jenkins ) , a heroin addict whom Angela had treated at the rehabilitation hospital where she worked as a nurse , came to their house looking for money and offered to sell her son to them , to which they eventually agreed . When Deirdre returned to the hospital as a patient soon after and suspicion arose as to where her child was , Angela knew they had to leave town . They moved to Fairview and bought a house on Wisteria Lane , changing their names to Paul , Mary Alice and Zach Young . In 1993 , however , Deirdre came to their home , seemingly sober , demanding that she reclaim her son . After a verbal fight , Deirdre went to take her child , when Mary Alice stabbed and killed her . Zach woke up and saw the body , which led to years of his parents brushing off his memories of that night as nothing . Paul and Mary Alice dismembered Deirdre 's body , put it in a toy chest and buried it under their pool . Years later , Martha recognized Mary Alice in a group photo in Felicia 's house , leading to Felicia to tell Martha about how Angela and Todd possibly disappeared with Deirdre 's child and hopefully gave Dana a proper home . Martha then blackmailed Mary Alice and she , in desperation , committed suicide . </P>
<P> Felicia Tilman ( Harriet Sansom Harris ) , Martha 's sister , soon arrives on Wisteria Lane to find out what happened to her sister . While inside Paul and Mary Alice 's house , she recognizes a picture of Mary Alice and claims her to be Angela , a nurse she worked with years prior in Utah , but Paul is adamant that she is mistaken . Felicia , however , knows that Mary Alice was in fact Angela and later tells Zach that she knew him when he was a baby , and that his original name was so lovely : Dana . In the first - season finale , the mystery behind Mary Alice 's suicide is revealed in full . In March 1990 , Todd and Angela Forrest could not conceive and one night a woman named Deirdre Taylor ( Jolie Jenkins ) , a heroin addict whom Angela had treated at the rehabilitation hospital where she worked as a nurse , came to their house looking for money and offered to sell her son to them , to which they eventually agreed . When Deirdre returned to the hospital as a patient soon after and suspicion arose as to where her child was , Angela knew they had to leave town . They moved to Fairview and bought a house on Wisteria Lane , changing their names to Paul , Mary Alice and Zach Young . In 1993 , however , Deirdre came to their home , seemingly sober , demanding that she reclaim her son . After a verbal fight , Deirdre went to take her child , when Mary Alice stabbed and killed her . Zach woke up and saw the body , which led to years of his parents brushing off his memories of that night as nothing . Paul and Mary Alice dismembered Deirdre 's body , put it in a toy chest and buried it under their pool . Years later , Martha recognized Mary Alice in a group photo in Felicia 's house , leading to Felicia to tell Martha about how Angela and Todd possibly disappeared with Deirdre 's child and hopefully gave Dana a proper home . Martha then blackmailed Mary Alice and she , in desperation , committed suicide . </P>
who did mary alice kill on desperate housewives
who did mary alice kill on desperate housewives
Deirdre Taylor
Deirdre Taylor