From Coinfire article:
"The DHS investigation also names a second individual based in Saudi Arabia as a potential second suspect in money laundering operations. This individual gave Mr. Garza large sums of cash off the books via wire transfers and was complacent and intimately involved with Mr. Garza."
That does not mean it was ISIS, although it is a strong indicator since so many princes there (and their subordinates) are known to support it. Additionally the individual may not be Saudi. I have not yet had time to go through the article posted yesterday (its been opened in a new tab since it was published). I have not seen what direct quotes they have from that investigation which is why I asked. There have just been too many people misreading things lately so I wanted to be careful slinging group names around (eg the "coinfire editor" that turns out it was never said to be an editor in the original source material).