A former St. Paul police officer was sentenced Wednesday to 90 days in jail for his involvement in an assault outside an East Side bar in 2018.

In a deal with Ramsey County prosecutors, Tou Mo Cha pleaded guilty in August to one count of third-degree assault. The case was at the center of an incident that resulted in the firing of five St. Paul police officers in June.

Under his sentence, Cha may be eligible to serve his time under electronic home monitoring. He will be on a five-year probation with a 15-month prison sentence stayed.

Cha previously admitted in court to hitting a man he described as his wife’s nephew in the head with a club outside Checker Board Pizza.

The assault took place after St. Paul police were called to the Arcade Street bar where a fight broke out among a group gathered outside. Cha runs the bar with his wife.

Police told Cha to disperse the crowd, and he did. But three people came back, trying to make their way back into the bar.

Cha attempted to stop them, and he said the men started hitting him with a club. At some point, he was able to wrestle it away from them and started hitting his wife’s nephew with it.

The man was hospitalized and needed 24 staples to close the gash in his head.

Five police officers — Nicholas Grundei, Robert Luna, Christopher Rhoades, Nathan Smith and Jordan Wild — are accused of failing to intervene, and then lying about what happened. After being fired this summer, they are appealing the decision.

Cha resigned as a police officer 14 years ago after he was accused of lending his department-issued handgun. Someone then used the gun to shoot into a restaurant and a house.