What was William Leaonard modus operandi?

Modus operandi is a Latin term used in English-speaking circles to describe an individual's or group's habitual way of operating, which forms a discernible pattern. The term is primarily used when discussing criminal behavior, but it is not exclusively uttered in this context. Modus operandi can also be defined as a specific method of operation.

For example, military strategists refer to an enemy's modus operandi when predicting the next threatening move in an armed conflict. Synonymous with the term "operating mode," modus operandi is routinely shortened to the initials "M.O.," in both written and verbal usage.

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