Not necessarily. He could be administrator for that estate and needs to cover estate expenses which will eventually be re-couped. How he funds his business account is up to the attorney. When I administered my mother's estate, it was financially smart of me to pay her bankruptcy fees and discharge her debts so that my sister and I could avoid those estate claims. I recovered those expenses later on in the process by making a claim against the estate as administrator expenses.
There are tax consequences for him with using his IRA and he knows that.
That's my opinion. Nothing seems suspicious to me. It is common for attys working as administrators to pay expenses and recoup later.