Larissa and her sister have an argument; Larissa decides to move out
Piper had told Larissa to leave her townhouse where Larissa would sometimes stay when she came to Rapid City from Manderson, on the Pine Ridge Indian Reservation.
Sibling of Victim
Larissa and her mother Lisa visit on the back porch of her townhouse
They were in the back porch of a Rapid City townhouse, discussing Larissa’s recent argument with her older sister, Carol Piper. Larissa then left with her boyfriend and a female friend after saying they wanted to go to the nearby Rushmore Mall.
Parent of Victim
Larissa leaves her mom's house with her boyfriend and female friend to go to Rushmore Mall
Larissa texts cousin to say she is with two male friends from Pine Ridge
“They found her at her boyfriend’s house, so they took her,” Larissa's mom, 55, said in a phone interview Thursday. Larissa’s boyfriend thought one of the men was her cousin since Larissa introduced him as such, even though they were not related, Lisa said.
Larissa's brother reports her missing
One of Larissa’s brothers reported her missing to the Rapid City police a few days later, said Lisa, after Larissa’s boyfriend told the family she could not be found.
Rapid City Police Department announced a $5,000 reward for help in solving the case of Larissa’s disappearance
The RCPD downgraded the reward from the identification and prosecution of the person responsible, to the location of her body in order to generate fresh leads on the case. Although the case is still considered a missing person, the police believe her body is buried within 100 miles of Rapid City.