WASHINGTON (AP) — The sister of a gunman who killed 12 people at the Washington Navy Yard last year says she hopes the families of her brother’s victims are healing.

The Washington Post reports Naomi Alexis, the sister of former Navy reservist and IT contractor Aaron Alexis, says that the grief she feels for the families’ suffering is “palpable” and that “the guilt, at times, paralyzing.”

READ MORE: Road Closures & Parking Restrictions To Expect For The Preakness Stakes

Tuesday marks the one-year anniversary of the shooting.

The paper says Naomi Alexis initially agreed to an interview, saying she felt it was time to talk about her brother and the mental health issues his killings raised.

But the paper says she cancelled the interview and her willingness to answer questions was reduced to a few brief phone calls, emails and text messages.

“It’s very scary for me now that the time has come,” the paper said she wrote in an email explaining her change of heart. “I don’t want to feel out of control. People died. There’s a tremendous amount of grief and pain wrapped up in all of this.”

READ MORE: With Near-Record Heat On Tap For The Preakness, Be Sure To Stay Cool

She wrote to the paper that she has been stigmatized as a result of her brother’s actions.

“I’ve had people stop returning emails, phone calls once they Googled my name,” she wrote in an email.

After Aaron Alexis’ name became public last year, reporters tried to speak with his mother at her home in Brooklyn, New York. At the time, she made only a brief remark.

“I don’t know why he did what he did and I’ll never be able to ask him why. Aaron is now in a place where he can no longer do harm to anyone, and for that I am glad,” his mother Cathleen Alexis said in a statement. “To the families of the victims, I am so so very sorry that this has happened. My heart is broken.”

MORE NEWS: Employee Shot At Owings Mills Pizza Shop

(Copyright 2013 by The Associated Press. All Rights Reserved.)