Yep....
Maybe he did it at night so most of the odors would have dissipated by the morning.
I may be giving him too much credit. It does sound like his wife is just as guilty (as in how did the dead woman’s car make it from his house to the bus station?)
A bloody mess to clean up is a bloody mess and a bugger to clean up, as well as painting isn’t quick job either. So I don’t she wasn’t aware of that either.
And holding on to the ‘letter’ this long. And VOILA! Now hubby is gone.