When she sees that he has been murdered and that his work is missing, she realizes she is the next likely target. Her only chance is to complete the research and post it to the Internet, so killing her would no longer serve the purposes of a cover-up.
Seeing that he has been killed and his work is missing, she deduces that she is now the most likely target. To thwart any cover-up, her best chance is to complete her research and post it online, thereby eliminating the motive for killing her.