It was early Sunday morning when the party wrapped up in Park Meadows.
"There was alcohol involved and they were having an alcohol party," said Bryan Police Chief Ty Morrow.
Kalyn Plagens was there.
"I was at the sweet 16, it was for Kadee and we had left cause my sister had a curfew at one," said Plagens.
Kalyn Plagens and her sister Kadee knew the Benavides brothers well, and were even closer to Alex Dicky.
"I lived with Alex for probably three months," said Plagens. "My sister has lived with Alex for about a year. We just moved out last week when Tricia, when Alex's mom had left."
Plagens says with Alex's mother out of the country, Alex's house was the perfect place to host a sweet 16 party.
"Cause Alex's house is big," said Plagens.
Although Police say the alcohol served at the party likely contributed to the wreck, Plagens says she didn't see any.
"We had left and there was no alcohol while we were there," said Plagens.
MySpace posts and pictures show the underage group was no stranger to alcohol, but Plagens doesn't believe it was alcohol that took the lives of driver Dillon Benavides and his passengers.
"Alcohol may have played a factor but I think most of it was just him having the new car," said Plagens.
Friends say the car involved in the crash was Dillon's. Police say it belonged to Alex's mother.
The medical examiner has not yet determined what killed the teens, and toxicology reports will be released later.