There's a book set after Bloodlines, but they avoid mentioning shit. I think that got retconned when Gehenna doesn't end the world. It gets mentions in Beckett's diary, where he omits mentions of the protagonist, but he does paste an article stating that "a terrorist attacked a temple in Chinatown", massacring all the "Chinese" inside.
Also, Beckett can smell the slain Sabbat members in the Hallowbrook hotel.
As to why he's avoiding mentions of the protagonist, that's probably so WW can let you headcanon. In-universe, maybe the reason why he's not referencing the protag is because he doesn't want people to find the bastard.