Delaware Attorney General Responds to DUI Arrest Involving Sussex County Prosecutor
January 7, 2026/
Attorney General Kathy Jennings has confirmed the DUI arrest of Martin Cosgrove, who had been serving as a senior Sussex County prosecutor and previously held the role of Chief Prosecutor, calling the incident disappointing and serious. Jennings says Cosgrove is accused of driving under the influence and damaging property in a hit-and-run and will be prosecuted. To avoid any conflict of interest, the case has been reassigned to a veteran prosecutor from a different county and division within the Department of Justice. Jennings also emphasized the broader public safety risks of drunk driving, saying no one—especially those tasked with enforcing the law—is above it.
AG Jennings’ Statement:
“I was extremely disappointed to learn that one of our senior prosecutors in Sussex County, Martin Cosgrove, drove under the influence and damaged property in a hit-and-run. He has been charged and will be prosecuted.
I have stated before that the point of the law is to guarantee that, regardless of the individuals, we all play by the same rules. Prosecutors are agents of the law, but we are not and must not be above it. To that end, and to foreclose any personal or professional conflict, this case has been assigned to the Director of our Family Division, a veteran prosecutor with both misdemeanor and felony trial experience, who works in a different county, Division, and Court than the defendant.
This is a very sad moment for everyone who knows Marty well at the DOJ. He has been a decades long friend and colleague whom I have always admired. And he has been a deservedly well-respected prosecutor and member of the Sussex County Bar who recently served as Chief Sussex County Prosecutor.
I am grateful that nobody, including Marty, was hurt. But our country’s casual attitude toward drunk driving is out of hand, and it has to stop. This is a cultural problem and a public safety threat that we cannot tolerate—least of all among those with the privilege to enforce the law.”