The jury said they were deadlocked twice this afternoon, and after the second time, they requested additional explanation of the law in an attempt to reach a unanimous decision. Ultimately, the jury ended up breaking for the weekend without a verdict.
Earlier this afternoon, the jury sent three notes to the judge, indicating their divisions and that specifically there was a single holdout.
Slager had pleaded not guilty to murder. But as the trial concluded this week, the jury was also allowed to consider a voluntary manslaughter charge, officials told ABC News. The voluntary manslaughter charge was requested by the prosecution and the judge allowed it based on testimony he heard during the trial.
"The court must let the jury decide if the force used was reasonable," Judge Clifton Newman said. "That's the essence of the case."
Slager also faces a federal trial, which is scheduled for next year.
ABC News' Steve Osunsami contributed to this report.