Currently, the police have not apprehended a suspect.
Police say the five individuals had traveled to the apartments, "possibly to conduct the private sale of a dog."
Jakobi Maddox was a new father with a 1-year-old at home and was started to turn his life around.
One person was shot and two people were taken into custody after an altercation at the fair.
SWAT personnel discovered suspect with two self-inflicted gunshot wounds, and EMS pronounced him deceased at 6:30 a.m. on Saturday.
Both the student and another Montgomery High School Student were contacted inside of the residence.
The identities of the victims have not yet been disclosed.
Sioux City Police obtained an arrest warrant for first-degree murder for 21-year-old Sioux City resident Mario Alberto Corona Ruiz.
Police ask public to please stay out of the area.
Officers found two loaded handguns in the car as well as an amount of marijuana.