A 5-year-old suffered brain injury from the collision, her lawyer said.
The three-car crash between former Kansas City Chiefs assistant coach Britt Reid that injured two children, including one seriously, has been examined with the local prosecutor's office.
Police handed over the investigation to the Jackson County Prosecutor's Office in"recent times," the workplace confirmed to ABC News.
A spokesperson for the office had no additional comment on the situation, including any timeline for reviewing it or any charges recommended by authorities.
Reid, 35, was driving a Ram pickup truck when he hit two vehicles which were stopped on both sides of southbound Interstate 435 just after 9 p.m. local time, according to authorities.
A 5-year-old was in critical condition with a brain injury and a 4-year-old was hospitalized with non-life-threatening injuries after the crash, authorities said. All other automobile occupants suffered minor injuries.
He didn't combine the Chiefs in Tampa for the Super Bowl that weekend.
According to a search warrant application acquired by ABC News, an officer at the scene reported "a moderate odor of alcoholic beverages glancing" from Reid, which his eyes were bloodshot. Reid allegedly told the officer that he had two to three drinks and'd taken Adderall, according to the warrant.
Authorities had said they were investigating whether Reid was impaired prior to the crash.
Ariel Young, the 5-year-old severely hurt in the crash, probably has permanent brain damage, her family's attorney told"Good Morning America."
"We are going to be advocating for the many serious charges and also the most serious sentence that Britt could ever get," the lawyer, Tom Porto, said in an interview a month. "We do not possess the toxicology back -- I don't understand what it is going to be. What I do know are the statements that he made to police that night. If you have a couple of drinks, and then you get behind the wheel of a vehicle, you are probably over the lawful limit"
His contract has since died and he is no longer with the team.