A year after a University of California, Berkeley professor was killed during a custody dispute in Greece, his family says they’re fighting to try to get alleged squatters out of his East Bay home.

The family of Przemyslaw Jeziorski said the alleged squatters have been living in the Berkeley home for months, but California’s eviction process has made removing them far more complicated.

Jeziorski was shot and killed in Greece last July in the middle of a custody battle. The boyfriend of Jeziorski’s ex-wife later confessed to the shooting. Jeziorski’s ex-wife, Nadia Michelidaki, died by suicide in a Greek prison this past May.

The former couple’s home, used for Airbnb, is now occupied. Court records show the people living there claim they signed a one-year lease with Jeziorski’s ex-wife and paid $30,000 up front. Erinne Stratte, the Jeziorski family’s attorney, said that’s impossible because she was in prison when the lease was allegedly signed.

“The homeowner just has to let the squatters stay, and based on their criminal background and the inconsistencies in their statements, it’s clear that they are not telling the truth,” Stratte said.

Last December, Berkeley police found signs of a break-in and possible squatting. A woman later returned claiming she had a one-year lease. Stratte said the occupants have provided no proof of a lease or payment, and police reports show conflicting accounts of when they moved in. Despite eviction notices, they remain in the home.

“If they are making an allegation, they gave money to someone, and then the law is requiring us to indemnify or prevent the squatters from harm in case someone else took advantage of them, which I see as a flaw in the law,” Stratte said

NBC Bay Area went to the home and knocked on the door, but no one answered. The phone number listed in court records has been disconnected.

The family alleges the occupants have been selling belongings from the home — something neighbors said they’ve seen at yard sales.

Attorneys said the court process could take months. Meanwhile, Jeziorski’s brother, Lukasz Jeziorski, continues to raise the couple’s 11-year-old twins while paying the mortgage on the home the children are supposed to inherit.

“They are stealing from the two orphans,” Lukasz said. “If you ask me what I think about them, I feel nothing good. I feel that they are very bad people.”