Ann Arbor Police Department recovered.

"A 15-year-old girl who went missing was discovered dead three days later at the football stadium of the high school she attended.
The Ann Arbor Police Department stated that foul play was not suspected in Adriana’s death and that ‘we do not believe there is an active threat to the community’."

https://www.msn.com/en-us/news..../us/missing-15-year-