The 2-year-old was playing in a house in Alabama when he picked up the weapon and fired it at the other child.
Attorney Ven Johnson told Newsweek the 'racist' toddler video posted by Trump and his campaign, "was absolutely done to advocate for what I believe to be a racist, despicable message against two little babies."
The treatment, known as Zolgensma, has a price tag of $2.1 million per patient.
The event is thought to have taken place in 2018 when the child's biological mother, 45 year old Alice Todd, allegedly handed the 2-year-old to husband and wife, Tina Chavis, 47, and Vicencio Romero, 53. In return, NBC reports she received a 1992 Plymouth Laser Hatchback.
The 2-year-old victim, who has not been named, passed away from her injuries after being rushed to Advocate Christ Medical Center in Oak Lawn, officials said.
The two-and-a-half year old had been missing for 12 hours, and a total of 400 mounties was deployed to find him.
The child drove his tractor down the sidewalk to the fairgrounds, through a back gate and through a heavy crowd of people attending opening night festivities before he got to the Tilt-a-Whirl.
The lawyer blamed cruise company Royal Caribbean for the incident.
Police are investigating the incident, which took place as the vessel was docked in Puerto Rico.
The boy lived with his parents inside a fenced off area in the park.
Monica Dominguez claimed her daughter died while bathing unsupervised.
Steve Garrett Todhunter, 25, was arrested over the weekend and charged with aggravated child abuse and domestic violence by strangulation or suffocation.
"I'm not sure how you're going to take this, but it's bad," the daycare owner reportedly told the child's mother in a text message.
U.S. Army soldier Andrew Schmidt, 40, pleaded guilty to creating and transmitting graphic images of his daughter.
Some 174 skulls were found inside clandestine burial pits in the Gulf state of Veracruz earlier this month.
The body of missing Florida boy, Jordan Belliveau, has been found.
Deasha Ringgold has been charged with homicide.
"It's just tragic," said Constable Alan Rosen.
He was being looked after by family friends while his parents were out.
"If you were living in Africa three million years ago...without any means of defense, you'd better be able get up in a tree when the sun goes down."
President Donald Trump was in Texas Thursday to "listen" and "learn" from families of the victims of a recent school shooting in Santa Fe.
Police made three arrests.