KANSAS CITY, Mo. — Another adult and a teen are now facing charges Thursday in the deadly shooting at the Kansas City Chiefs’ Super Bowl parade and rally.

Terry J. Young has been charged with second-degree murder, unlawful use of a weapon and two counts of armed criminal action, Jackson County prosecutors said.

Court documents say the 20-year-old was involved in an argument that escalated to gunfire at the Chiefs rally, leaving one woman dead and at least 25 others injured.

Young is now the third adult charged in the shooting, including 18-year-old Dominic M. Miller and 23-year-old Lyndell Mays.

Prosecutors said Young and two others walked up to another group when the argument began. Jackson County Prosecutor Jean Peters Baker previously said Mays pulled out a handgun; new court documents say Young pulled out a gun as well and advanced toward him.

Prosecutors said others also pulled out firearms and started shooting. Surveillance video appears to show Young shooting several times, court documents say.

While all three of these men are accused in the shooting, prosecutors say it was Miller that shot and killed Lisa Lopez-Galvan.

All three are in custody. Mays and Miller are being held on $1 million bonds, and prosecutors have requested the same for Young.

Juvenile charged

The Jackson County Family Court also said Thursday that a third juvenile has been charged in the Chiefs rally shooting.

A 15-year-old was charged late Wednesday with felony unlawful use of a weapon — shooting at a person and armed criminal action.

The teen is being held in the Jackson County Juvenile Detention Center.

He hasn’t been identified at this point because he’s only charged as a minor. Family court officials plan to hold a certification hearing to determine if the 15-year-old should stand trial as an adult.

Other charges

Two teenagers have also been charged in family court. Earlier this week, the Office of the Juvenile Officer amended charges against one 16-year-old suspect to Class B felony of unlawful use of a weapon and Class E felony of resisting arrest.

These two teen suspects also haven’t been identified yet because they haven’t been certified to stand trial as adults.

The court said in a certification hearing will be held April 30 in which the Family Court judge will determine whether the 16-year-old should stand trial as an adult.

A second 16-year-old teen suspect remains detained at the Juvenile Detention Center on gun-related charges.

Suspects in custody

Peters Baker said everyone that officials have identified as shooting a firearm at the rally has been taken into custody.

Although all alleged shooters are in custody, Peters Baker said additional charges are still expected. Federal court documents said 12 people pulled firearms and at least six fired their weapons. 

Peters Baker said she’s experienced major investigations before, but this case “stretches beyond anything she has seen before.”

“We get complicated cases, but this case has been challenging,” she said in a release.