On 6 March 2025, the DSI announced it would launch a probe of unlawful gatherings and related money laundering related to the 2024 election.[8][6] Earlier in February, Senate Speaker Mongkol Surasajja expressed strong opposition to any DSI probe into the election.[9]
On 19 March 2025, the EC announced it had created a 26th subcommittee to investigate election fraud complaints.[8]
On 7 May 2025, the EC was reported to be planning to charge 60 members of the Senate with charges related to vote-fixing in the 2024 election.[4][10]
On 9 May 2025, the EC delivered summonses to 6 of 53 senators being investigated for vote-rigging.[11] The 6 senators, all representing Bangkok, were Alongkot Vorakee, Chokchai Kittithanesuan, Jirasak Chookhwamdee, Pibulat Haruehanprakan, Wuttichart Kalyanamitra, and Phisut Rattanawong.[11] 47 more senators representating the provinces were awaiting summonses.[11]
On 14 May 2025, the DSI announced there were around 1,200 suspects under investigation under their probe examining money laundering during the 2024 election.[12]