Back in December, after a series of homophobic posts on her defunct, decade-old blog resurfaced on social media, the MSNBC host Joy Reid apologized for them. But this week, when Ms. Reid was confronted with a new batch of homophobic writings from that same period, she said she had been the victim of hackers.

That claim was called into question on Tuesday, when the Internet Archive, the meticulous online record-keeping nonprofit that hosted the archived version of her site, said it had found no evidence to support her claim.

Late Tuesday night, MSNBC provided documents that show Ms. Reid’s lawyers alerted Google and the Internet Archive to the alleged hacking in December, shortly after her public apology but long before the latest batch of posts appeared on social media.

The latest group of alleged blog posts includes a great deal of material that might embarrass a prominent liberal figure like Ms. Reid, including expressions of disgust at the thought of homosexuality, opposition to gay marriage, claims that gay men prey on “impressionable teens” and criticism of political correctness.