Zhang, 26, was kidnapped and killed in June 2017 by former University of Illinois graduate student Brendt Christensen, who was sentenced last month to life in federal prison without parole.
WATCH: Yingying Zhang's family speaks following Brendt Christensen's sentencing
Brendt Christensen sentenced to life in prison for murder of U of I Chinese scholar Yingying Zhang
[Ads /]
Christensen, a former physics grad student at U of I, picked up Zhang at a campus bus stop and then raped and tortured her in his apartment before secretly disposing of her body.
Zhang's DNA was also found inside his Champaign apartment. There were also recordings played at trial in which Christensen described in gruesome detail the kidnapping and murder.
As the guilty verdicts were read in court in late June, Christensen didn't flinch. His demeanor appeared similar during eight days of testimony as the prosecution painted him as a "cold, calculating" killer who tortured Zhang and tried to hide his crime.
[Ads /]
Despite the conviction, Zhang's body has never been found.
However, Zhang family attorney Steve Beckett tells the ABC7 I-Team that federal authorities now have reason to believe Christensen disposed of the woman's body in a way that her remains could have ended up in a Vermilion County dumpsite.
That information, according to Beckett, was provided to the government by Christensen's attorneys under an immunity agreement.
"When the family first came here, their wish was to find Yingying and bring her home," said the Zhang family's attorney Zhidong Wang said after Christensen's sentencing in June. "That's still, that's still their hope."
"(Christensen) had a dark desire to kill for the sake of killing," said Assistant U.S. Attorney Eugene Miller in closing arguments. "He wanted a certain type of woman. A petite woman who could easily be disposed of."
[Ads /]
It isn't known whether any search efforts have been undertaken and there are two landfills in Vermilion County. A spokesperson for Republic Services that owns both of the dumps on Friday afternoon told the I-Team that the company is "fully cooperating with the investigation and any additional media inquiries should be directed to local authorities.
Zhang's family attorney was scheduled to hold a news conference at 3 p.m. Friday in Urbana however it was cancelled.
PREVIOUS BRENDT CHRISTENSEN, YINGYING ZHANG COVERAGE
Brendt Christensen Trial: Ex-wife testifies about day U of I student Yingying Zhang disappeared
Brendt Christensen's ex-girlfriend testifies about wire recording from Yingying Zhang vigil
Brendt Christensen U of I case turns on the footprint of a killer
Brendt Christensen Trial: Video of FBI interrogation played on day 2 of Yingying Zhang murder trial
RELATED: FBI agent testifies in University of Illinois murder trial
RELATED: Defense admits Brendt Christensen killed Yingying Zhang at U of I
RELATED: U of I murder trial about to open under witness cloud
RELATED: Chinese student enrollment at U of I takes hit
RELATED: Jury selection begins in case of dead Chinese scholar at U of I
RELATED: Death penalty trial looms for accused killer of Chinese scholar at U of I
RELATED: Feds reveal gory scene in apartment of accused Chinese scholar killer
RELATED: Unusual new legal twist in U of I Chinese scholar murder
RELATED: Sneaky Search? Accused Champaign killer claims feds secretly tossed jail cell
RELATED: Accused killer at U of I tries to draw Trump, Chinese president into case
RELATED: Feds plant two secret informants in U of I murder case
RELATED: Family of missing U of I scholar returning to China
RELATED: A Mystery at U of I
RELATED: Family of Chinese U of I scholar pleads for help finding her body
RELATED: Missing Chinese scholar's family asks for tips, reward $50K
RELATED: Man charged with kidnapping U of I scholar denied bond
RELATED: Man charged with kidnapping U of I scholar appears in court
RELATED: Man charged in kidnapping of U of I scholar was surveilled before arrest
RELATED: Champaign man arrested, charged with kidnapping missing U of I scholar
RELATED: FBI locates car related to missing Chinese scholar case
RELATED: Search continues for missing U of I scholar from China
RELATED: Family of Chinese U of I scholar pleads for help finding her body
RELATED: Visiting scholar missing from University of Illinois