25 year old Alexander Nwogu was killed just weeks after he started working at a consulting firm in Northern Virginia.

A police report said Nwogu suffered blunt trauma to the back of his head and a single gunshot wound to the middle of his back. He was pronounced dead at the scene.

“We are exploring the possibility,” said Brianna Jordan, spokeswoman for D.C. police. She said detectives “are very early in the investigation.” Police said robbery is a possible motive in both incidents.

Alexander graduated in May with a bachelors of science in industrial and systems engineering degree.

D.C. police say a $25,000 reward is being offered for information leading to the arrest and conviction of those responsible for Nwogu’s death.