She pleaded guilty to attempting to hinder prosecution, and a judge sentenced her to a year and a half probation.
"I've always prided myself on making good decisions and doing the right thing, in this specific matter I failed at that, I'm very sorry," said Jessica Dever-Jakusz.
Jessica Dever-Jakusz cried in court just before a judge handed down her sentence. The former detective is accused of having sex with a man who was the target of a narcotics investigation.
"It cost me a career that I loved and dedicated nine years to, and it almost cost me my marriage," she said.
Dever-Jakusz allegedly told the suspect he was under investigation. Prosecutors say her actions ruined the police department's five-month investigation.
"She did put other officers in danger, luckily the suspect she was involved with was not a super dangerous guy," said prosecutor Lindsey Coates.
Dever-Jakusz's husband stood by her side, telling a judge she's paid the price for her actions.
"I've suffered, our marriage has suffered, there's been embarrassment and sadness, but I will tell you no one has suffered more than Jess at this point," said her husband.
Jakusz left her job at the Tempe Police Department in 2013; she's now working at a gym.
"My life has been turned upside down, and I only have myself to blame. I'm very sorry for my behavior, and I regret everything I have done," said Dever-Jakusz.