New footage that shows what happened before and after Avonte Oquendo ran out of his Queens, New York, school on Oct. 4 has been released. 

In the video, an adult is shown walking down a hallway and out of a door. The door does not shut completely and is left open for a half hour, according to ABC 7 New York. Avonte then runs down the same hallway, at 12:03 p.m. and pauses when he gets to the door before running out. Later a school safety officer walks up the hallway and closes the door. 

Avonte's family lawyer, David Perecman, said that this is unacceptable. "Never again," he told ABC 7. "Don't let children leave school. Between bringing them to school and getting them home they can't disappear." Perecman filed a wrongful death lawsuit against the city alleging that school personnel failed to monitor Avonte.

Thousands gathered for Avonte's funeral Saturday in Manhattan. Avonte's body parts were discovered in the East River in Queens, New York, on Jan. 16. This was a sad ending to a more than three-month search for the teen. The cause of his death is still being determined.

On Sunday, New York Sen. Chuck Schumer proposed legislation called "Avonte's Law," that states the government would pay $10 million for GPS tracking devices for autistic children.

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Follow Natelege Whaley on Twitter: @Natelege.

(Photo: ABC Eyewitness News)