Seth Conrad Rich, a Democratic National Committee staffer, was shot and killed on Sunday in Washington D.C., according to reports.

Mary Rich, Seth’s mother, told NBC 4 in Washington that her son might have been the target of an attempted robbery at the time of his death. Seth, 27, was walking home through a Northwest D.C. neighborhood, while talking on the phone with his girlfriend at the time of the shooting, NBC reports.

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“Worst nightmare,” Rich said of learning about her son’s death. “There had been a struggle. His hands were bruised, his knees are bruised, his face is bruised, and yet he had two shots to his back, and yet they never took anything.”

According to Fox News, Seth – the DNC’s director of voter expansion – was attacked in the early morning hours and police said gunshots were heard around 4:20 a.m.

Seth was reportedly found conscious and breathing and was taken to a local hospital, where he died from the several gunshot wounds he sustained.

“Our hearts are broken,” DNC Chairwoman Rep. Debbie Wasserman Schultz said, according to Fox News. “Seth was a dedicated, selfless public servant who worked tirelessly to protect the most sacred right we share as Americans – the right to vote.”

Police reportedly have no suspects or potential motives for the shooting.

“They took his life for literally no reason. They didn’t finish robbing him, they just took his life,” Seth’s mother told NBC 4. “They hurt the community, and they hurt the long-term possibility of what he could have done.”