The cause of the crash has yet to be determined by the National Transportation Safety Board, which released a preliminary report on the crash in July.
In a statement to KOB4 television channel, members of the Meleski family said they were evaluating the results of the toxicology report and requested confidentiality.
The passengers who were killed in the crash have been identified by authorities as Susan Montoya, 65; Marie Sisneros-Martinez, 59 years old; Martin Martinez, 62 years old; and John Montoya, 61.
A hot air balloon ride was on Ms. Montoya’s “to-do list” and staff at Georgia O’Keeffe Elementary School, where she worked as a vice-principal, purchased the flight for her and three guests, Scott Elder, the superintendent of Albuquerque public schools said at a press conference at the time.
Ms Montoya was transferred to another school next year, and it was a farewell gift for her, he said.