5 Investigates has obtained the video at the center of a state police investigation, which has forced the resignation of a top state official. Watch the report DCR Deputy Commissioner Matthew Sisk resigned Friday, a day after state police launched an investigation into his improper use of lights and sirens in his state SUV. The video obtained by 5 Investigates shows Sisk's SUV driving on Congress Street in Boston with lights and sirens blaring on two days this past summer. "Governor (Charlie) Baker is disappointed to learn of the deputy commissioner's poor judgment in inappropriately using a state vehicle. He accepts his resignation and looks forward to a thorough review to ensure lights and sirens are strictly used for emergency purposes," said Baker's communication director Lizzy Guyton. It's the latest DCR headache for the governor who has seen his squeaky-clean image tarnished in recent weeks by the agency. Sisk and DCR Commissioner Leo Roy were suspended for a week without pay for using state funds for a private July 3 party where guests were whisked to the VIP section at the Esplanade in state funded golf carts. The party was held in a condo owned by the state's Republican National Committeeman Ron Kaufman. Sisk is another active Republican who has been a regular contributor to Baker's campaign. State police are investigating, but Sisk is not expected to face criminal charges, but he could be fined a few hundred dollars for misusing his lights and sirens. Meantime, the Baker administration says it's started a review to make sure lights and sirens on all state vehicles are only used during emergencies.

5 Investigates has obtained the video at the center of a state police investigation, which has forced the resignation of a top state official.

Watch the report

Advertisement Related Content Official who used state resources to throw July 3 party has resigned

DCR Deputy Commissioner Matthew Sisk resigned Friday, a day after state police launched an investigation into his improper use of lights and sirens in his state SUV.

The video obtained by 5 Investigates shows Sisk's SUV driving on Congress Street in Boston with lights and sirens blaring on two days this past summer.

"Governor (Charlie) Baker is disappointed to learn of the deputy commissioner's poor judgment in inappropriately using a state vehicle. He accepts his resignation and looks forward to a thorough review to ensure lights and sirens are strictly used for emergency purposes," said Baker's communication director Lizzy Guyton.

It's the latest DCR headache for the governor who has seen his squeaky-clean image tarnished in recent weeks by the agency.

Sisk and DCR Commissioner Leo Roy were suspended for a week without pay for using state funds for a private July 3 party where guests were whisked to the VIP section at the Esplanade in state funded golf carts.

The party was held in a condo owned by the state's Republican National Committeeman Ron Kaufman.

Sisk is another active Republican who has been a regular contributor to Baker's campaign.

State police are investigating, but Sisk is not expected to face criminal charges, but he could be fined a few hundred dollars for misusing his lights and sirens.

Meantime, the Baker administration says it's started a review to make sure lights and sirens on all state vehicles are only used during emergencies.