A Hint of Dirty Deeds Washed and Dried

Everyone talks about money laundering. I often wondered what that meant. So I found out from a good source, the internet. There's alot of information on the subject, if you just search. An example goes something like this.., What if an elderly man had thousands in his bank account and some of those thousands disappeared during his relationship with a woman, who had a past for greediness and conning. The old man's family then tried to find his missing money, they even went to the authorities for help, but to no avail. The old man died and the greedy woman moved on. Time passed and soon a very suspicious transaction occured. The greedy woman and her new husband purchases a piece of real estate, using all cash as a large down payment, for grins and giggles let's say around fifty thousand dollars. The other suspicious part would be that the man and his wife created an LLC in one state and then made a purchase of the new real estate in a different state, using the LLC that they had created, for the use of said purchase of real estate. The new real estate was soon sold after the purchase and the LLC was closed. My question would then be-who in the world uses all cash, for a down payment? And then uses two different states to purchase and then resell the real estate, after just purchasing it. Seems like alot of trouble to go through to purchase a piece of real estate, if you ask me, but no ones asking me so I would have to think this is suspicious. This could be one example to explain a way that a person would hide stolen money and attempt to wash it clean, I guess that's why it's called money laundering, and now we both know.