https://www.nytimes.com/2019/03/26/sports/conor-mcgregor-sexual-assault.html
There are other articles out there but this is probably as good a place to start as any.
That's a good high level overview but there were some pretty gruesome medical details in the piece I read.
trying to summarize what I read (keep in mind I went down a rabbit hole with this, and I'm not sure where fact ends and rumor starts here, so don't take any of this as fact -- just my interpretation of a mixed bag of sources) :
Police responded to a complaint, when they saw the victim they immediately took her to the hospital. They took DNA evidence. the process with Irish law around the accused is pretty different than in the US (and probably better). They strive to not name names of people who are accused of something -- names can be shared with media once a (conviction is reached? or a case goes to trial? not sure here.). So the Irish media has been generically referring to the suspect as something like "a prominent international Irish athlete" .
Here's a sample story from that Frame of reference. The police took hotel security footage from where the attack was alleged to have occured, and specifically took video surveillance evidence from / surrounding CM's room. CM supposedly admitted that he did have sex with the victim, on the night this alleged crime happened, but that the sex was consensual.
Then there's a giant post on Sherdog written by someone who claims to run in the same larger social circles in Dublin as CM. It doesn't seem out of place with the douchey behavior we've seen from CM, but I have no way of knowing if it's 100% true, a complete lie and a troll/hit piece by someone who hates him, or somewhere in between. But if even half of it is true, man. Take everything you think about CM being an ### and multiply it x 10.
Read for yourself,
it's the first post in this thread (it's long!) and come to your own conclusions about how true and horrible, or how made up and libelous it all is.
@Punxsutawney Phil , tagging you since you asked for links. There may be others I read last night too, but I don't have time to deep dive again at the moment.