Metro

A timeline of State Police controversies

John Tlumacki/Globe staff

A steady drumbeat of scandals and controversies in recent months have the Massachusetts State Police reeling and under intense scrutiny from taxpayers, lawmakers, and state and federal investigators.

The issues have involved everyone from rank-and-file troopers and civilian employees to top commanders in the state’s law enforcement agency, including its former top official who resigned amid public pressure last fall.

Many cases remain under investigation, including state and federal criminal probes into allegations that troopers stole money by billing the state for overtime shifts they never worked.

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Below is a timeline of how the turmoil has unfolded.

If you are unable to view the interactive graphic below, click here.

Matt Rocheleau can be reached at matthew.rocheleau@globe.com. Follow him on Twitter @mrochele