Senior officers may now be considering bringing Trident into the Homicide and Serious Crime Command (HSCC) wing of the Met, which is home to 24 murder investigation teams.

BBC: Operation Trident poster

In Poland, a traditionalist and ruralist party, Samoobrona (Selfdefence), came third, nabbing seven seats. (Two other right-wing parties, the crime-bashing Law and Justice and the Catholic-nationalist League of Polish Families, also did well.) Two parties in Austria and the Netherlands, though not strictly Eurosceptic, campaigned successfully against corruption and mismanagement in Brussels.

ECONOMIST: Unhappy voters send a message | The

So perhaps it is a sign of the gravity of Mexico city's crime epidemic that Andres Manuel Lopez Obrador, its populist left-wing mayor, has turned to Rudolph Giuliani.

ECONOMIST: Can Rudolph Giuliani make Mexico city safer?

Right wing parties are attempting to focus on illegal immigration and linking it with rising crime.

CNN: Italy's radicals raise clone debate

His campaign slogan spoke of crushing crime with an "iron fist ", an image reinforced by the clenched fist emblem of his right-wing Patriotic Party.

BBC: Profile: Guatemala President Otto Perez Molina