According to the criminal complaint, the bus driver, a contractor for Minneapolis Public Schools, was trying to merge onto Interstate 35W near Chicago Avenue when the bus apparently scraped Lilly's black sedan.
Traffic cameras show Lilly, who appeared to be a uniformed security guard, pull his vehicle into a lane of traffic before getting out and making his way toward the bus.
The suspect, identified by authorities as Kenneth W. Lilly, 31, pulls over in front of a pickup truck and school bus, then walks over to the bus and fires five rounds from his pistol, Minnesota's WCCO-TV reported. Two of the bullets struck the 78-year-old male bus driver in the head and left arm.
In a blurry video of the incident released by the Minnesota DOT, a man who is allegedly Lilly gets out of the auto and walks back toward the bus, which is halted in traffic on the highway.
Plunkett said after the court appearance Friday that Lilly is thinking about the school bus driver's well-being.More news: Blackface, sexual assault & full-birth abortion: Virginia Democrats in crisis
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The bus driver was rushed to a local hospital, but is expected to survive.
Paul faces one count of second-degree attempted murder and one count of second-degree assault in connection to the shooting of the bus driver Tuesday.
"The actions of Mr. Lilly were outrageous and it was sheer luck that neither the bus driver nor the little girl were killed", Hennepin County Attorney Mike Freeman said in a news release. No attorney was listed for him in court records.
He said police are still investigating the shooting, "and if we can add aggravating circumstances for a longer sentence, should we prove him guilty, we will do so".
Shocked motorists flooded 911 with calls that a bus driver had been shot along a major Minneapolis freeway at rush hour Tuesday. Lilly told officers that he feared for his safety and that is why he shot at the bus driver.