Maier also continued that matter to Dec. 13.
Since the brothers are still considered juveniles under state law, details of the hearings or any motions filed in the case are not available to the public and lawyers are barred from discussing them.
No court date has been set on the motions to try the brothers as adults.
If convicted as adults, the teenagers would face at least 30 years in state prison without parole, authorities said.
Autumn's parents - Anthony Pasquale and Jennifer Cornwell - sat through both sets of hearings Friday. They also attended an earlier detention proceeding Oct. 26.
The family's legal adviser, Jaime Kaigh, said later the parents "are committed to coming to every second of every hearing."
"I think that they are holding up the best that can be expected," said Kaigh, a criminal lawyer and former prosecutor. "I think the built-in delays in the legal system are hard for victims' surviving family members to understand."
Officials have not released the suspects' names, but residents of Clayton, where the pair and their alleged victim lived, have identified them as Justin Robinson, 15, and his 17-year-old brother Dante.
Autumn, a bicycle motocross enthusiast, disappeared Oct. 20 after she went to the Robinsons' home across town to exchange bike parts, according to authorities.
When she did not return home, her family reported her missing and officials and townspeople launched a major search.
Her body was found in a large residential recycling container behind a home next to the Robinsons' residence on East Clayton Avenue on the night of Oct. 22. The brothers were arrested the next day.
The teens are being held at the Camden County Youth Center at the Lakeland complex.
Contact Joseph Gambardello at 856-779-3844 or jgambardello@phillynews.com
