Deputy Cochise County attorney Paul Correa was off-duty at the time. He was booked into the Cochise County Jail on allegations of public sexual indecency and evidence tampering.
The abandoned building is famously used as a location for "Hawkins Lab" in the hit Netflix series, "Stranger Things."
Justin Golden, 21, was sentenced to serve 30 years in prison.
Madison Bergmann, 25, was sentenced to serve six years in prison and six years of extended supervision.
Neves Valente came to the United States in 2000 on an F-1 student visa and began a doctoral program at Brown that fall.
Nick had been staying at a high-end Los Angeles rehab facility that specializes in substance abuse treatment, which reportedly costs around $70,000 a month.
Greg, Cristina and their 14-year-old daughter Emma and five-year-old son Ryder all died in the crash.
The details emerged as investigators admitted that they were still struggling to determine a motive for the deadly rampage.
John's crucial tip surfaced after he began posting on Reddit, saying he recognized the suspect shown in the images released by authorities following Saturday's deadly shooting.
Kevin Conover, 49, faces up to 111 years to life in state prison if convicted of all counts and allegations, which include counts of aggravated sexual assault of a child and lewd acts upon a child.
Larry Richmond Sr. was found guilty of murdering Evansville firefighter Robert F. Doerr in 2019 after conspiring with his wife, Elizabeth "Becky" Fox-Doerr.
Brown University President Christina Paxson said it was likely Valente had once taken classes inside the same building during his time as a student.
Matthew R. Sierra has been charged with first-degree intentional homicide, first-degree intentional homicide of an unborn child, arson and mistreatment of animals causing death over the death of 27-year-old Alexis Pickett and her dog.
Susan Avalon, 51, was arrested after allegedly shooting dead both of her ex-husbands in two separate shootings that took place on the same day.
Although Valente's motive remains unclear, sources say, he likely has an old grudge against Loureiro that led to the killings.