Police wouldn't say specifically what the relationship was between the alleged killer and his victim, but a family member tells us the girl who died was 6 months pregnant.
Police began investigating and found their suspect, a football player at Mishawaka High School: 16-year-old Aaron Trejo.
“It was learned that these two individuals knew each other through the football team at Mishawaka High school,” said Aredt.
Deputy Prosecutor Chris Fronk says the prosecutor's office will file formal murder charges Monday morning.
Mishawaka High School released a statement: