What city has the most murders per capita?
Flint, Michigan has the highest murder rate per capita of any US city. Flint is followed closely by Detroit, Michigan and New Orleans, Louisiana. The safest city in the United States is Windsor, California.
This is a difficult question to answer. Lisbon is by far the largest city and as a result has the most money. However, this does not make it the wealthiest city per capita in Portugal. I imagine that one of the resort towns in the Algarve which have wealthy British expats is probably the wealthiest city per capita. For the "normal" Portuguese cities I would expect Porto to surpass Lisbon in per capita wealth.