Jonesboro shootings

Who did it? Mtichell Johnson 13 and Andrew Golden, 11
What happened? The younger of the two asked to be excused from class and went and pulled the fire alarm, then he went to meet Johnson in wooded area. They were 100 yards away from the schools gym, when kids flowed out of the school doors, they opened fire. In the end they had killed 4 students and one teacher, also injuring 10 other students. They were found a little bit later with 13 firearms and 200 hundered rounds of amunition, all this stolen from the golden famillies supplies along with some bows and hunting Knifes. In there possesion as well was a stolen van were they kept all the suppplies. Neither of these boys were strangers to guns, both belonged to gun clubs were they shot at moving human targets. It was said that Golden had been shooting at dogs to get ready for the real shooting. Since of there young age they could not be tried as adults and were sent to a reform school tell they're 18, the law changed and were kept somewhere else tell they were 21.Why? The theroy was thought that they were targeting certain people such as there ex girl friends that recently brooke up with them. That was never proven for sure and was also thought that it was maybe conisdental. I think I would take the angle of unusualness