Money order scam

Someone I was talking to , named Mark, claimed he was a missionary, and was temporarily in Nigeria. He lost his wallet, in a car crash on the way to the airport. He was hurt, in a hospital , had no wallet. Thieves at the wreck site stole it, before the police arrived. He needed my account number in Bank Of America , so he could transfer money to it from his account in Bank of America. I did not have an account. I opened a savings account and a checking account. I only gave him to number to the savings account. He transferred 1600.00 directly into my savings account. I asked the bank if this was acceptable and they assured me that it was safe. If the money was coming from his account , within their bank,, it was a safe transaction.
I was instructed to withdraw the money, and send it via western union. I did exactly that. If the money was not there, they could not have given it to me, because that account had nothing in it previously.
About a month later, I was driving home and got a phone call from Bank of America. It seems that someone hacked into 2 different accounts within their bank, transferred the money to my account, which I drew out and sent to him. I had trouble proving that I did not give him my account password, user name or even the number of my active bank account. ONLY the empty savings account. They emptied my checking account immediately . leaving me absolutely penniless. The also turned this in on my credit report. I did provide all thepertinent information,, as well as emails to the FBI and to Western Union. Needless to say, I lost my money AND my credit.

I'm very sorry to hear your story. It might be worth you making the point to the bank that they were negligent in giving you the advice they did. It depends on how much you told them of the circumstances.
It's a very common way of getting money out of a phished bank account without any risk to the scammer, and something I would expect any bank to be aware of.
Can you post the scammer's email address, please.