A Democrat has held the office of Suffolk County's district attorney for the past few years. Now there’s a Republican who says his years of experience are enough to end that streak.

Democrat Tim Sini says he's earned another term as Suffolk County district attorney.

“We're running on our record, which is reforming the District Attorney's Office, decreasing crime each and every year, including decimating the violent street gang MS-13,” he says.

However, opponent Ray Tierney says Sini exaggerates his accomplishments. Although not affiliated with any party, Tierney is running on the Republican and Conservative lines.

Tierney is a former prosecutor in Suffolk County and Brooklyn, and was a federal prosecutor.

“I've been a gang prosecutor my entire career. I have 50 separate convictions on MS-13 murders — 50 separate murders — that occurred on Long Island,” he says.

Tierney says Sini has “never prosecuted a case, he's never tried a case, he's never tried an MS-13 case.”

Sini says that claim is “flatly untrue.”

“We brought the largest ever MS-13 case in U.S. history,” he says. “The indictment is public— 96 indictments here in Suffolk County and a total of 300 arrests worldwide. And although we have murder cases, most of those cases are murder conspiracy cases and other offense. Why? Because we stopped the murders from happening.”

Tierney says Sini is too focused on getting media attention and says he would bring more professionalism to the job.

“I've prosecuted crooked politicians, Republicans, Democrats, Conservatives…Massive white-collar crime cases, crimes against women, computer crime cases,” Tierney says. “I've done all the things countless times that he has not done once.”

Democrats are seeking what would be their sixth consecutive Election Day victory for district attorney.

Republicans are trying to recapture the office they haven't held since 2001.