Corruption
16 events, 1972 to 2023; 3 marked as turning points.
1972
MGR expelled from DMK; AIADMK founded
After demanding that DMK ministers declare their assets, M. G. Ramachandran was expelled and launched the Anna DMK.

1976
Sarkaria Commission of Inquiry into the DMK government
A one-man commission under Justice R. S. Sarkaria was appointed to inquire into corruption charges against the dismissed DMK government.
1995
Wedding of Jayalalithaa's foster son Sudhakaran
More than 150,000 people watched the extravagant Madras wedding of V. N. Sudhakaran, Chief Minister Jayalalithaa's foster son, an event later drawn into corruption cases.
1996
Shankar's anti-corruption vigilante film Indian, starring Kamal Haasan, became the highest-grossing Tamil film on release and India's Oscar entry.
Jayalalithaa arrested in colour TV case
Former Chief Minister J. Jayalalithaa was arrested and remanded in judicial custody in a corruption case over the purchase of colour televisions.

2000
Pleasant Stay verdict and the Dharmapuri bus burning
Jayalalithaa was sentenced to a year's imprisonment in the Pleasant Stay hotel case; in the violence that followed, three agricultural students were burnt to death in a bus at Dharmapuri.
Jayalalithaa convicted in the TANSI land case
A trial court convicted Jayalalithaa and Sasikala over the purchase of state TANSI land by their firms in 1992, a verdict that barred her from the 2001 election.
2001
Midnight arrest of M. Karunanidhi
Former Chief Minister M. Karunanidhi was arrested at his Chennai home in the early hours in a case over the construction of city flyovers.

Supreme Court unseats Jayalalithaa, O. Panneerselvam becomes Chief Minister
After the Supreme Court held Jayalalithaa's appointment invalid, O. Panneerselvam served as Chief Minister until she returned in March 2002.

2003
Jayalalithaa assets case transferred to Bangalore
On a DMK petition, the Supreme Court moved the disproportionate assets trial of J. Jayalalithaa from Chennai to a special court in Bangalore.
2009
The DMK won the Thirumangalam assembly by-election on a turnout of about 89 percent, amid allegations of cash being paid for votes.
2011
Former Telecom Minister A. Raja and later Kanimozhi were arrested in the 2G spectrum case; a special court acquitted all accused in 2017.

2014
Jayalalithaa convicted in disproportionate assets case
A Bengaluru special court convicted Jayalalithaa, forcing her to resign; the Karnataka High Court acquitted her in 2015 and she returned as Chief Minister.

2015
Jayalalithaa acquitted on appeal and returns as Chief Minister
Acquitted in the assets case by the Karnataka High Court, J. Jayalalithaa took the oath as Chief Minister for a fifth time.

2017
Sasikala convicted; Edappadi K. Palaniswami becomes Chief Minister
After the Supreme Court restored V. K. Sasikala's conviction, AIADMK legislators chose Edappadi K. Palaniswami as Chief Minister.

2023
Minister V. Senthil Balaji arrested by the ED
The Enforcement Directorate arrested Electricity Minister V. Senthil Balaji in a money laundering case linked to a cash-for-jobs scam.