The St. Joseph County judge also denied bail Tuesday for 16-year-old Aaron Trejo, who's charged as an adult with murder and feticide. He appeared at the hearing via a video feed.
Trejo's family plans to hire a private attorney.
Prosecutors say he told officers he fatally stabbed Breana Rouhselang because he was angry she waited so long to tell him she was pregnant that it was too late to get an abortion.
Her body was found in a dumpster in their hometown of Mishawaka, about 80 miles (130 kilometers) east of Chicago.
Trejo is a Mishawaka High School football player and Rouhselang was a team manager. Relatives say she was six months pregnant.
Copyright 2019 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.