The phrase "asserts later" is correct and usable in written English.
It can be used when referring to a statement or claim that is made at a subsequent point in a text or conversation.
Example: "The author presents several arguments in the introduction, but he asserts later that the main issue is often overlooked."
Alternatives: "claims subsequently" or "states afterward".
It featured a Spanish hero and a heroine with a sprained ankle, and was, Roberts asserted later, "simply dreadful".
Petitioner Sullivan contends that he was denied a fair trial in two respects: (1) the only specific evidence against him was an alleged admission which Lubben testified Sullivan made to him testimony which Lubben, it is asserted, later recanted; and (2) the trial judge's instructions allowed the jury to consider evidence that had not been admitted against him.
It looked like iceberg lettuce, but players asserted later it was indeed cabbage, the leafy, "firm-headed," Brussels sprouts-parenting, bloated basketball-looking vegetable that, on average, weighs about six times more than a baseball — and has come to define the Nationals' dramatic wins this season.
The lower house of Russia's parliament called for Russian athletes to boycott the closing ceremony, a show of pique initially endorsed by Putin's spokesman, Sergei Yastrzhembsky, until Russian Olympic officials in Salt Lake City asserted later today that the team would stay through Sunday's closing ceremony.
John S. Wilson asserted later that only God would be able to influence his position as leader of the nation's only historically black all-male college. .
Black Hawk asserted later that had Posey chose to attack him and his warriors that the blow dealt Black Hawk's band would have been decisive and war-ending.
"You can't expect people who have mental health issues to be pleasant because they're ill," Baraka later asserts in his video after concluding that she may have been unruly to the hospital's staff in some way.
Although some progress was made, Ismāʿīl did not realize his goal of creating a new southern province but did assert what later became an important element in nationalist thought the political unity of the Nile valley.
Trump triggered a new uproar Wednesday morning when he appeared to suggest that Russia is no longer seeking to interfere in U.S. elections — prompting the White House to assert hours later that his words had been misconstrued.
Sewell, the Malnatis assert, came later.
