A fourth suspect in the brawl in Riverfront Park surrendered on Thursday, according to police. Three white boaters were first charged with assaulting a Black ferry co-captain on Saturday in Montgomery, Alabama.

The Montgomery Police Department reports that Mary Todd, age 21, was detained and charged with one count of third-degree assault.

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Todd followed in the footsteps of two other suspects who surrendered themselves to the Montgomery Police Department on Wednesday. The department said on Wednesday, “Both Allen Todd, 23, and Zachary Shipman, 25, turned themselves in to police today”; both men were charged with one count of assault in the third degree, a misdemeanor.

Following the filing of charges on Tuesday, the 48-year-old white male fourth suspect, Richard Roberts, was the first to turn himself in, according to police, according to ABC News. Roberts was accused of two third-degree assault offenses.

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A white man appeared to have punched Pickett to start the brawl, according to footage shot by onlookers and obtained by ABC News. When other white people entered the argument, it appeared to spark a fight between those people, Pickett, and onlookers. Other videos shot by onlookers reveal that spectators got involved in the altercation in an apparent effort to defend the co-captain. One man is even seen swimming from a riverboat to the dock.

Damien Pickett, a Black male dock worker, and the co-captain of the Harriet II were the victims in this case, according to Montgomery Police Department Chief Darryl Albert. He also made mention of a 16-year-old Caucasian male who was allegedly hit by the owners and captains of the private boat that was preventing the riverboat from docking.

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Albert also mentioned that authorities want to speak with a man who was allegedly seen on camera brandishing a folding chair.

Albert responded that police “looked at every avenue” and “left no stone unturned,” but “were unable to present any insight in a riot or racial racially biased charges at this time” when asked if there was any evidence of a hate crime.