John Segale, a Smart family spokesperson, told CNN the family was notified by law enforcement officials Tuesday that Paul Flores and his father, Ruben Flores, were arrested Tuesday morning.
Two law enforcement sources confirmed the arrests were made Tuesday. Paul and Ruben Flores are in the custody of the San Luis Obispo County Sheriff’s Office, one of the sources said.
Last month, authorities searched Ruben Flores’ home in Arroyo Grande. Flores’ son, Paul, has remained the prime suspect in the decades-long missing persons case.
News of the arrest was met with emotion from the Smart family, Segale said.
There were “a lot of really emotional moments,” he said. “A lot of prayers, astonishment, excitement, happiness, and of course sadness. Sadness, because this has gone on for 25 years. The Smart family had not been able to bury their daughter. There was no closure.”
The San Luis Obispo County Sheriff’s Office plans a 2 p.m. local time news conference (5 pm. ET).
Smart was declared dead in 2002.
Last year, investigators searched Paul Flores’ home, and said they found “items of interest” on the property.
At that time, Flores was detained at his San Pedro, California, home and released back to his home after the search, Tony Cipolla, a spokesperson for the sheriff’s office, said at the time.
Smart disappeared after she and other students walked home from a fraternity party.
She was last seen near her dorm, police said, but she never made it to her room. Friends and family never heard from her again, authorities said.
She did not have identification, money or extra clothing when she disappeared, police said.
A massive search and repeated interviews with a student who walked with her that night yielded no breaks, and Smart was declared dead in 2002.
Last year, the sheriff’s office said it was working the case and provided a list of its efforts since 2011, when the present administration took the helm, including: performing 18 searches at nine locations; submitting 37 pieces of evidence for DNA testing; recovering “140 new items of evidence”; and conducting 91 interviews.
CNN’s Stella Chan and Ray Sanchez contributed to this report.