Acting U.S. Capitol Police chief Yogananda Pittman testified on Thursday that cellphone records show former USCP chief Steven Sund requested National Guard support from the House sergeant-at-arms as early as 12:58pm on Jan. 6, but he did not receive approval until over an hour later.Why it matters: Sund and former House sergeant-at-arms Paul Irving clashed at a Senate hearing on Tuesday over a dispute in the timeline for when Capitol Police requested the National Guard during the Capitol insurrection.Stay on top of the latest market trends and economic insights with Axios Markets. Subscribe for freeIrving insisted that he has no recollection of receiving the request until after 2pm. Lawmakers are looking for accountability over that hour of lost time, when pro-Trump rioters were able to breach and ransack the Capitol."I did not get a request at 1:09 that I can remember," Irving, who resigned after the insurrection, testified. "The first conversation I had with chief Sund in that timeframe was 1:28, 1:30. In that conversation, he indicated that conditions were deteriorating and he might be looking for National Guard approval."Details: Pittman testified to a House subcommittee that Sund's phone records show the former chief first reached out for National Guard support to Irving at 12:58pm.Sund then spoke to former Senate sergeant-at-arms Michael Stenger to make the same request at 1:05pm, per Pittman.Pittman says Sund repeated his request to Irving at 1:28pm, then spoke to him again at 1:34pm, 1:39pm and 1:45pm.Go deeper: Pittman testifies officers were unsure of lethal force rules on Jan. 6Like this article? Get more from Axios and subscribe to Axios Markets for free.