One of Ozark’s most unpredictable killers, Darlene Snell, was responsible for a hefty amount of Ozark character deaths throughout the series, but never killed Ruth even after Ruth betrayed her.  

In a shocking turn, Ozark season 4, part 1 ended with Darlene’s death at the hand of the Navarro Cartel’s newest leader, Javi, along with Darlene’s new husband, Ruth’s cousin, Wyatt. 

Ozark's Darlene and Ruth have always had a strange and tense relationship. Even after Ruth gets killed by Camila Elizondro as revenge for Javi's death 

Ozark follows the Byrde family after they relocate to the Lake of the Ozarks, Missouri in a plot to build a laundering empire for the Navarro Cartel.  

Once there, Marty Byrde (Jason Bateman) takes Ruth Langmore under his wing and the pair strike up an unlikely kinship grown from Ruth’s cleverness and business acumen. 

Marty comes to trust Ruth implicitly, with both cartel business and issues with the local criminals, heroin dealers Jacob and Darlene Snell. 

However, the Ozark season 3 ending sees Ruth break from the Byrdes after they fail to avenge her following her brutal beating by Frank Jr. of the Kansas City Mob. 

When Darlene (Lisa Emery) shoots Frank Jr. in retribution for Ruth, Ruth becomes a partner in Darlene’s heroine business alongside her cousin, Wyatt, who is also Darlene’s boyfriend.