Generate a question which can yield the answer mentioned in the input. Generated question must be answered by the answer provided in input, without using any extra knowledge.
Q: Context : Franz Muller (31 October 1840 -- 14 November 1864), was a German tailor who was hanged for the murder of Thomas Briggs, the first killing on a British train.
Answer : murder
A:
Which crime led to the conviction of Franz Muller?