A few anomalies regarding the school shooting.

The shooter was teased for being poor. He was driving a $70,000,00 pickup and had a couple of very expensive rifles as well as wearing body armor. He shot his grandmother over an unpaid phone bill, drove away, got his truck stuck and started shooting at a funeral home. After 12 minutes of shooting at the funeral home he crossed the street and entered the school through an open door. He then barricaded himself in a room where he killed the kids and teachers. The cops gathered outside and did not try to enter the school because they said they didn't have a ballistic shield. Many parents gathered and urged the police to act. Federal marshals detained several parents. Other parents broke into the school and brought out their children. After an hour or so some Border Guards arrived, stormed the school and killed the shooter. The border guard who entered the room and killed the shooter was grazed by a bullet from the shooter. The bullet went through the border agent's baseball cap and opened a wound in the agent's scalp.

A few questions:
1) How did the shooter afford the truck, rifles and body armor if he couldn't pay his phone bill?
2) Where were the police when he was shooting at the funeral home?
3) Why were the doors of the school still open when there were shots being fired across the street from the school?
4) Why didn't the police do anything?
5) Why were there federal marshals there?
6) Why were the police and federal marshals arresting parents?
7) Why were the border agents the ones to enter the building?
8) If lack of protection kept the cops out why did the border guards go in without adequate protection?