ABC News July 17, 2022

Jan. 6 committee expects more information soon from Secret Service amid deleted Jan. 6 messages

WATCH: Decision on Trump criminal referral not yet made: Rep. Zoe Lofgren

Ahead of Thursday's hearing by the House's Jan. 6 committee, investigators anticipate receiving more information from the Secret Service "to get the full picture" of what occurred before and during the Capitol insurrection last year, including as it related to text messages agents sent in that period of time, Rep. Zoe Lofgren said Sunday. 

"We expect to get them by this Tuesday," Lofgren, a California Democrat and member of the House committee, told ABC "This Week" co-anchor Martha Raddatz. Lofgren was referring to "pertinent texts" the agency said they had in the wake of a complaint last week from an internal watchdog that the Secret Service had deleted texts from Jan. 5 and Jan. 6, 2021, after the watchdog sought those records.

"We need all of the texts from the fifth and sixth of January. I was shocked to hear that they didn't back up their data before they reset their iPhones. That's crazy, and I don't know why that would be," Lofgren told Raddatz, "but we need to get this information to get the full picture."

In a previous statement, the Secret Service -- which was subpoenaed by the committee on Friday -- said any "insinuation" that they "maliciously" deleted texts was false and that the committee had their "full and unwavering cooperation."

On "This Week," Raddatz asked Lofgren about what evidence the public could expect at Thursday's hearing, which the committee has said will detail the Trump White House's reaction to the unfolding riot.

MORE: Jan. 6 committee sets next -- and possibly final -- hearing, to detail riot reaction 'minute by minute'

"I'm going to let the hearings speak for itself, but we hope to go through minute by minute what happened, what didn't happen on that day and people can make their own judgment," Lofgren said.

She said the hearing would not touch on the allegation of witness tampering that Wyoming Republican Rep. Liz Cheney, the committee's vice-chair, raised during the last hearing -- saying that Trump had attempted to contact an unnamed witness who hasn’t appeared publicly. (Trump's spokesman called Cheney a liar.)

Jacquelyn Martin/AP, FILE
Zoe Lofgren, listens as the House select committee investigating the Jan. 6 attack on the Capitol holds a hearing at the Capitol in Washington, July 12, 2022.

Raddatz noted that while some in the public have been influenced by the committee's evidence during the hearings, "a recent Monmouth poll [from late June] found less than a quarter of Americans are paying attention and 90% of those say the hearings have not changed their minds."