Secret Alliance usually originates from one person (or a group of persons) who lusts for power. Members who join Secret Alliance must swear an Oath of Silence, they must not betray the secrets to outsiders, or else they lose their lifes. They are highly organized and they protect one another right or wrong, not only minor crimes, but up to murders.
They share power, wealth together. It is the "They-Us precept" and not LORD's "One Law for All" precept.
They would resort to murder to achieve their purposes. Mr. Lee Kuan-Yew of Singapore talked about the Communist Party in Singapore in the 60's : "If you oppose them, they will fix you. When they fix you, they shoot you!". Please read [Book of Daniel, Old Testament, Chapter 7] for LORD's revelation on this. If you have the time, [Book of Mormon] is a worthwhile book, it described the Secret Alliance among the Maya people and how it caused the total destruction of the Maya people.