TINLEY PARK, Ill. — A homicide investigation is underway after authorities say a 17-year-old girl was found dead Sunday night inside a Tinley Park home.

The Medical Examiner identified the victim as Mia Maro, a senior at Victor Andrew High School, and ruled her death a homicide.

Detectives identified a person of interest, who they say is not a threat to the community. As of 9 p.m. Monday, no charges had been filed.

Neighbors who spoke with WGN News said Maro lived in the house with her parents and two brothers.

One neighbor, who wished not to be identified, said yelling at the home in the 7800 block of W. 167th Street grabbed her attention Sunday evening.

“There was a lot of shouting. ‘What did you do? What did you do?’” said the neighbor. “Then I heard him scream, ‘you’re a psychopath.’”

Throughout the day Monday, Maro’s friends and classmates collected flowers and signed a poster on her front lawn.

“She was one of the sweetest, kindest, smartest girls I’ve ever met,” friend Elyana Aldabbagh said. “I genuinely thought she was going to make a nice impact on this world because she was amazing. She helped me in school a lot.”

Aldabbagh said Maro was a talented athlete who ran track and cross country with her in middle school and helped her with AP government in high school. Maro was just weeks away from graduating.

Other classmates admired her work ethic and how she treated others.

“She always made a bad situation good,” classmate Trinity Maze said. “Every time I walked into the class, I was excited to get to talk to her, and it’s just really sad that this is how it ended.

“I just don’t know how graduation is going to work. That’s going to be really sad.”

Andrew High’s principal sent a message to students saying counselors and social workers will be available to them all week.

A GoFundMe has been created to help pay for her funeral services.