While the incident involving J.T. marked the last time Nikki had a brush with the law, it was far from the only one. According to Fandom, Nikki was responsible for the murder of two others. She killed Diane Jenkins (Alex Donnelley) in Season 38 of Young and Restless, and she also ended Christine Blair's (Lauralee Bell) life during a hit-and-run. In the Jan. 15, 2019 episode of the show, Nikki was also shown aiming a loaded gun against a stalker she originally assumed was J.T. 

What's more, Nikki got arrested for a drunken bar fight, and she was suspected of blackmailing Elise Moxley (Jensen Buchanan). 

Catch the current episodes of Young and Restless from Wednesday on at 12.30 a.m. ET on CBS.