Game: Murder of Mrs. Jones

Mr. Allen is reading the newspaper. A front page article says:
Mrs. Jones Killed In A Skiing Accident
Last Saturday in the Swiss Alps, Mrs. Jones fell to her death from a mountain while skiing.
Mr. Allen went to the police station and said, Mr. Jones killed Mrs. Jones.
How did he know?

Hints:
Mr. Jones and Mr. Allen had met before.
The Jones family lived in the U.S.A.
Mr. Allen sold something to Mr. Jones.
Mr. Jones was skiing with his wife.