Rizzi probably got well paid; at any rate, he was constantly demonstrating his fitness "to do big things in a big way," and be received into the small company of the elect--to go forth and blackmail on his own hook and hire some other picciott' to set off the bombs.
Whoever the capo maestra that Rizzi worked for, he was not only a deep-dyed villain, but a brainy one.

The gang hired a store and pretended to be engaged in the milk business.

They carried the bombs in the steel trays holding the milk bottles and cans, and, in the costume of peaceful vendors of the lacteal fluid, they entered the tenements and did their damage to such as failed to pay them tribute.

The manner of his capture was dramatic.

A real milkman for whom Rizzi had worked in the past was marked out for slaughter.