Cold Justice is back in search of the truth.

Prosecutor Kelly Siegler returns to tackle more gruesome unsolved murders in E! News' exclusive first look at the Oxygen true crime series' upcoming eighth season.

"We're looking into some of the toughest cold cases in the country and time is running out," Siegler says in the new trailer, released Aug. 22. "We're digging up new evidence to uncover the truth."

Working with law enforcement, Siegler and her team—including investigators Steve Spingola , Abbey Abbondandolo , Tonya Rider , Terri Hook , Lesa Hodgkins and Murray Newman —will leave no stone unturned in their hunt to uncover missed clues and track down killers who are still at large.

Their main goal? To finally give the victims' families and friends peace.

As Siegler a

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