We could now learn more details about a June stabbing that happened at Hannibal's Huckleberry Park.
The three people were arrested in connection to the case.
Lauren Sinclair, 21, Zachary Kuntz, 24, and Aaron Weatherby, 18, each face assault charges.
Kuntz also faces a charge of unlawful use of a weapon.
Weatherby was in Marion County court Monday. He pleaded not guilty.
Weatherby will next appear in court on September 8.
Police say two men in their 20s went to the park around 12:20 a.m. to meet someone.
That's when when the three suspects allegedly assaulted them.