Losik’s mother said yesterday that there are still unanswered questions about the case.

“We still don’t know what happened,’’ said Zhanna Losik. “We don’t know how he ended up in the water. It’s devastating news for us, and it doesn’t answer anything. Actually, we have more questions now.’’

The body was found Nov. 8. Losik went missing Feb. 20.

Police said in a statement that the medical examiner had determined the body’s identity, but the cause and manner of death remained unknown.

Zhanna Losik said authorities had told the family that the identification had been made through DNA testing. She said police found her son’s cellphone and car keys in his pocket but not his wallet, which raised more questions.

Eugene Losik, a graduate of the University of Massachusetts Amherst who worked as an electrical engineer at Raytheon, was staying with his girlfriend at the Boston Marriott Long Wharf Hotel.

Security cameras caught a picture of him leaving the waterside hotel alone just before 2:30 a.m., heading into the adjacent Christopher Columbus Park.

Rowes Wharf, where the body was found more than eight months later, is several hundred yards south of the park.