“If the accuser has been penetrated that would be hard to achieve in a struggle.”
Rapists seem to have not had too much of a problem with it, throughout human history. In fact it was said a Mongol warrior could accomplish the task on horseback - but then again he was most likely both a skilled rider and an experienced rapist.
Innocent men don’t start by saying they have an airtight alibi - and then shift to “it was consensual” once they hear that there is DNA evidence on hand.
It is a 64 year old man,not a mongol warrior who beat his victim into submission. The reporting is bad and I have not read they have found smoking gun evidence of dna. The reporting convicts the guy but evidence leaves me with reasonable doubt at this time. We will see,