A watchdog agency learned in February that the Secret Service had purged nearly all cellphone texts from around the time of the Jan. 6, 2021, attack on the Capitol, but chose not to alert Congress, according to three people briefed on the internal discussions.
That watchdog agency, the Department of Homeland Security’s Office of Inspector General, also prepared in October 2021 to issue a public alert that the Secret Service and other department divisions were stonewalling it on requests for records and texts surrounding the attack on the Capitol, but did not do so, the people briefed on the matter said. They spoke on the condition of anonymity to discuss sensitive internal investigations.
It’s thought the lost messages may have provided critical information about former President Donald Trump’s plans and actions around the riot. https://www.washingtonpost.com/national-security/2022/07/20/secret-service-national-archives/
Secret Service turns over single message to Jan. 6 panel: ‘I smell a rat’ https://thehill.com/homenews/house/3567781-secret-service-turns-over-single-message-to-jan-6-panel-i-smell-a-rat/
Eideard 
A watchdog agency learned in February that the Secret Service had purged nearly all cellphone texts from around the time of the Jan. 6, 2021, attack on the Capitol, but chose not to alert Congress, according to three people briefed on the internal discussions.
That watchdog agency, the Department of Homeland Security’s Office of Inspector General, also prepared in October 2021 to issue a public alert that the Secret Service and other department divisions were stonewalling it on requests for records and texts surrounding the attack on the Capitol, but did not do so, the people briefed on the matter said. They spoke on the condition of anonymity to discuss sensitive internal investigations.
It’s thought the lost messages may have provided critical information about former President Donald Trump’s plans and actions around the riot. https://www.washingtonpost.com/national-security/2022/07/20/secret-service-national-archives/
Secret Service turns over single message to Jan. 6 panel: ‘I smell a rat’ https://thehill.com/homenews/house/3567781-secret-service-turns-over-single-message-to-jan-6-panel-i-smell-a-rat/