WORCESTER, MASS. (WHDH) - Prosecutors presented new evidence Tuesday in the trial of a driver accused of hitting and killing a state trooper in 2016 with THC in his system.

Prosecutors with the Worcester County District Attorney’s Office said surveillance video shows David Njuguna buying medical marijuana at a dispensary in Brookline before the deadly crash.

They say Njuguna had THC in his system when he slammed into Trooper Thomas Clardy’s cruiser while Clardy was conducting a traffic stop on the Mass. Pike in Charlton.

Njuguna’s attorney says his client had a seizure before the crash.

Clardy, an 11-year veteran of the force, left behind a wife and six children.

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