A newlywed couple went for a hiking trip outside the country. After two days, the wife returned and informed the police that her husband had fallen while hiking and could not survive. Police registered the case. The next day, they returned to her home and arrested her. On asking why they were arresting her, the police told her that her travel agent had called and they were arresting her for the murder of her husband.
How do you think the travel agent knew about the murder?