Two southeast Iowa teenagers used a basketball bat last fall to kill their high school Spanish teacher, and one of them described in social media posts how they followed the woman, carried out the attack, and hid her body, police allege in court documents publicly released Tuesday.

Also Tuesday, a judge rejected defense lawyers’ requests that the media be excluded from a hearing later this week at which the teens will seek to be tried in the juvenile system rather than in adult court.

Jeremy Goodale and Willard Miller, both 16 are charged with murder in the death of Fairfield High School Spanish teacher Nohema Graber, 66. Her body was found Nov. 3, hidden under a trap, a wheelbarrow, and railroad ties at the Chautauqua Park in Fairfield, about 95 miles (150 kilometers) southeast of Des Moines. She had been reported missing earlier that day.

Details about the case were included in search warrant information that had been sealed by a judge until this week.

The documents state that a witness who knew Goodale showed police Goodale’s Snapchat messages that indicated Miller and Goodale “were involved in the planning, execution, and disposal of evidence” related to Graber’s death. Goodale’s messages described out he and Miller conducted surveillance on Graber, how she was killed, where her body was located, where her car was parked, and how the teens disposed of and concealed evidence.

Included in the messages was a baseball that was used to kill Graber. Court documents said the teacher suffered “inflicted trauma to the head.”

According to the court documents, police investigators view surveillance video that showed Graber’s car left Fairfield High School and entered the part about 4 p.m. and Nov.2. The car was driven out of the park about 42 minutes later, followed by a pickup truck.

It’s likely Goodale and Miller would serve lengthy prison sentences if convicted as adults. If moved to juvenile court the two would be released from custody when they turn 18, less than two years.

The judge scheduled trial dates for the teens, with the trial for Goodale, set for Aug. 23 and Miller’s date planned for Nov. 1.