Question: In which city did this American environmental activist, represented by the defense attorney Dominique Tricaud in court, share the apartment with his ex-girlfriend whom he was convicted of murdering?

Context paragraphs:
Joe Browder: Joe Bartles Browder (April 10, 1938 – September 18, 2016) was an American environmental activist who spearheaded ongoing efforts to save the Florida Everglades.  He is considered to be a global environmental expert.  He is an advisor on energy, climate change, environmental policy to public-interest groups, foundations, auto and energy companies, other businesses, Native American tribes and government agencies.  He started out his career as a television news reporter, an active volunteer and later a paid representative for Audubon (the National Audubon Society).

Laurie David: Laurie Ellen David (née Lennard; born March 22, 1958) is an American environmental activist.  She produced the Academy Award-winning "An Inconvenient Truth" and, most recently, teamed up with Katie Couric to executive produce "Fed Up", a film about the causes of obesity in the United States.  She serves as a trustee on the Natural Resources Defense Council and a member of the Advisory Board of the Children's Nature Institute and is a contributing blogger to "The Huffington Post".

Trudy Coxe: Gertrude M. "Trudy" Coxe (born 1948) is an American environmental activist who is the current CEO of the Preservation Society of Newport County and the former Secretary of Environmental Affairs in the Commonwealth of Massachusetts.

Steve Van Matre: Steve Van Matre (born March 20, 1941) is an American environmental activist, author and educator.  He is the founder of the Earth Education movement and chair of the Institute for Earth Education.  Steve was a professor In the Leisure and Environmental Resources Association(LERA) at George Williams College Downers Grove ill in the 70's and eighties.

Dominique Tricaud: Dominique Tricaud (born, 1955 in Paris, France) is a lawyer whose fame in the United States derives from his being the defense attorney in Paris, France, of Ira Einhorn, the famous environmentalist, convicted "in absentia" of murder.  Tricaud claimed he had never lost an extradition case and that "the French will not send a man back to a barbaric country where he was tried without being present to defend himself".  Tricaud eventually lost the case and Einhorn was convicted of the murder of his girlfriend, Holly Maddux, in the United States.  The Einhorn case was the basis for the TV film "The Hunt for the Unicorn Killer" in 1999.  Einhorn was convicted in the United States in 2001.  He was also the advocate for Jean Germain, mayor of Tours, who died before standing trial.

Peter DeTroy: Peter DeTroy (April 13, 1948 – May 28, 2016) was an American defense attorney from Portland, Maine.  He graduated from Bowdoin College in 1969 and then received his law degree from the University of Maine School of Law in 1972.  DeTroy was a prominent defense attorney.  He served on the Falmouth School Board.  He was partner in the firm Norman, Hansen & DeTroy from 1984 until his death.  DeTroy was named one of 50 difference-makers in Maine by Maine Magazine in 2013.  DeTroy represented the famed defense attorney F. Lee Bailey, who is now a Maine resident, in his attempt to be able to practice law in the state after having been disbarred elsewhere.

Mike Roselle: Mike Roselle (born 1954) is an American environmental activist and author.  Roselle is one of the co-founders of the radical environmental organization Earth First! , as well as of Rainforest Action Network, the Ruckus Society, and Climate Ground Zero.

Cristina Gutierrez: Maria Cristina Gutierrez (February 28, 1951 – January 30, 2004) was an American criminal defense attorney who represented several high profile defendants in the 1990s and the first Hispanic woman to be counsel of record in a case before the Supreme Court of the United States.  She was the initial trial attorney for Adnan Syed, the Baltimore area teen who was convicted of murdering his ex-girlfriend, Hae Min Lee in 1999.  The murder trial and conviction gained national attention in 2014 and 2015 after being the subject of the first season of the online podcast "Serial".

Ira Einhorn: Ira Samuel Einhorn (born May 15, 1940), known as "the Unicorn Killer", is an American environmental activist convicted of murdering his ex-girlfriend Holly Maddux.  On September 9, 1977, Maddux disappeared following a trip to collect her things from the apartment she and Einhorn had shared in Philadelphia.  Eighteen months later, police found Maddux's partially mummified body in a trunk in his closet.  It had been packed with Styrofoam pellets, air fresheners, and newspapers.

Norma Alvares: Norma Alvares is an Indian social worker, environmental activist, lawyer and a founding member of "Goa Foundation", an environmental action group.  An alumnus of St. Xavier's College, Mumbai, she graduated in law and entered environmental activism.  Under the aegis of Goa Foundation, she initiated a public interest litigation (PIL), in 1987, to save the sand dunes of Goa, the first ever PIL filed in the state.  She has been involved in over 100 PILs and has served as an amicus curiae.  Her efforts are reported in winning a favourable court order for blocking a DuPont factory and in another one which restricted the mining activities in Goa.  She is the president of "People for Animals", an animal support group and is the founder of "Other India Book Store" and Other India Press, environmental initiatives.  Alvares is married to Claude Alvares, a known environmental activist and the couple lives in Parra, Goa with their three children, Rahul, Samir and Milind.  She was honored by the Government of India, in 2002, with the fourth highest Indian civilian award of Padma Shri

Supporting paragraphs: Dominique Tricaud Ira Einhorn
Answer: Philadelphia