This thin article didn't mention that apparently the school's video surveillance didn't fully match the girl's story. It was not just text messages.
Defense lawyers for both defendants have said the sex acts were consensual and that text messages and school surveillance videos did not substantiate the girl’s claims she had been pushed from a hallway into a bathroom at Rockville High School on March 16 where the suspects took turns assaulting her in a stall as she tried to break free.
Prosecutors declined to comment before the hearing about the decision in the case that rocked the suburban community near Washington, D.C. But they had signaled in an early court proceeding that they were having challenges corroborating events the girl described to Montgomery County Police detectives and that led to the arrests of Sanchez Milian and Montano.
...
According to the defense lawyers, the day before the incident, the girl and Montano, exchanged explicit text messages and images about planning to have sex in the school. Video from school cameras showed Montano and the girl walked together into the bathroom at the time of the incident, according to the attorneys, who also said the girl’s account of events was not consistent as the investigation progressed.
...
She said he asked to have sex and when she refused, pushed her into a boys’ bathroom and pulled her into a stall, according to the police affidavits. Sanchez Milian then entered the stall, according to girl’s account in the affidavit, and both raped her as she cried out and told them to stop.