Detailed Instructions: Generate a correct and concise answer for the question based on the words in the context.
Q: Context : Grace Marks (c. 1828 -- after c. 1873) was a Canadian maid who was convicted in 1843 of murder in the death of her employer Thomas Kinnear, and was suspected of murdering his housekeeper, Nancy Montgomery.
Question : For what crime was Grace Marks prosecuted?
A:
murder