Orlando shooter's current wife reportedly had knowledge of his intent...

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53. Read the post I was responding to...

and you will see why the term "legal level" was used.

"Salman told law enforcement on Sunday, hours after the attack at Pulse, that Mateen had recently scouted both the nightclub and Downtown Disney as potential attack targets." You equate that with a statement "I'd like to kill a bunch of people"?

" Aiding and Abetting a Crime (Penal Code section 31)

In California, you can be charged with the crime that was committed if you aided or abetted in its commission, but did not actually commit the crime yourself. Penal Code section 31 describes the phrase “aiding and abetting” as meaning that you assisted another person to commit a crime. Prosecutors can charge you as an aider and abettor whenever you:
●Know the perpetrator’s illegal plan,
●Intentionally encourage and/or facilitate that plan, and
●Aid, promote, or instigate in the crime’s commission.

You don’t have to be actually present at the scene of the crime to be charged under what is known as “accomplice liability.” If you willfully participated in the planning of a crime prior to its commission, you can be held criminally liable as an “accessory before the fact.”

https://www.wklaw.com/knowing-about-a-crime-and-not-saying-anything/