Jessica Sanchez, 16, was found dead at a friend's house near 29th and Quitman on Sunday.
She attended North Denver High School.
The homeowner, who declined an on camera interview, told 9Wants to Know Sanchez is a friend of her grandchildren.
The homeowner says she believed Sanchez was alive and sleeping on the couch when she left for work Sunday.
Neighbors say the home is known on the street for loud teenage parties that have prompted several responses by police in the past.
It's believed Sanchez was partying with friends the night before her death, according to police.
"Whether or not that contributed to this tragic event, we don't know," Det. John White with the Denver Police Department said.
Isaac Maldonado and other classmates say Sanchez was a well-liked student.
"She was always outgoing and she always had a smile on her face no matter what," Maldonado said.
Police don't suspect foul play, but they are looking into what Sanchez may have had in her system at the time of her death. A toxicology test is pending.
The family is holding a candlelight vigil at Save Our Youth (3443 West 23rd Avenue in Denver) at 7 p.m on Wednesday.
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