Mathira MP Rigathi Gachagua was on Monday grilled at the Directorate of Criminal Investigations (DCI) headquarters over corruption.
The legislator has been under the radar of investigative agencies over the unexplained source of Ksh12.5 in his bank accounts.
Rigathi is suspected to have used proxies to fraudulently secure tenders using 22 companies with him as the sole beneficiary.
The Assets Recovery Agency has been probing money laundering and graft claims against the MP who is a brother to the late Nyeri Governor Nderitu Gachagua.
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