A volatile homeless man known for carrying a knife and being aggressive towards women has emerged as a key suspect in the murder of a British woman whose body was found in a suitcase in Greece.The body of Elizabeth-Jane Ross, 38, was discovered by a vagrant stuffed into a travel bag in an abandoned car park in Athens.Ms Ross was a committed Christian and it’s believed she may have been in an area known for homelessness for compassionate reasons linked to her faith.She is believed to have regularly visited Greece over seven years to work for a number of NGOs helping vulnerable social groups including abused women and migrants – and is also thought to have been moved by the plight of the homeless.And it’s suggested she may have deliberately misled friends in Athens about her movements because she knew they would be worried if she told them she was going to be trying to help homeless people.Greek police are desperately trying to find a man named ‘Markos’ who haunts the Kypseli district of Athens, where Ms Ross's, known to friends as Lisa, remains were discovered.Markos regularly slept rough in the derelict space where the suitcase was found but has not been seen there since it became a crime scene – sparking a citywide manhunt.He is described as aged around 40, heavily tattooed with black hair and a stocky build.Elisabeth-Jane Ross was found dead with her body stuffed inside a suitcase in Athens, Greece Greek police are desperately trying to find a man named 'Markos'. He regularly slept rough in the derelict space where the suitcase was found but has not been seen there since it became a crime scene. Pictured: The abandoned building where Ms Ross was found Ms Ross, from Edinburgh, is thought to have travelled to Greece from Edinburgh via Cyprus in late June, and went missing on July 15.The 38-year-old’s body was found three days later – and it subsequently emerged that her phone had continued to be used after her death.Police have been questioning residents, shopkeepers and other homeless people around Kypseli in recent days.And the Daily Mail has learned that their search is now focused on Markos, a known heavy drinker and drug user with a reputation for being aggressive and threatening particularly towards women.People living in Kypseli say it is widely known that Markos attempted to rape a Bulgarian tourist at knifepoint as she walked through the abandoned car park while taking a shortcut home following a night out earlier this year.A Greek police source said that this suggestion is being explored by detectives investigating the murder of Ms Ross but insisted it had not been reported at the time, and they only became aware of it during their investigation in recent days.The source added: ‘We have a lead on a homeless man. We want to question a particular individual, but we are also looking for a number of other people as part of this investigation.’Hamid Reza, one of the homeless community in Kypseli, revealed that he was questioned for several hours by police searching for Markos.Local outlets released a photo of the 38-year-old, as investigations are ongoing to determine her cause of death