Police are searching for a light-colored GMC Jimmy or a Chevrolet Blazer as they hunt down the person responsible for the strangulation death of Clemson University student Tiffany Marie Souers.
Authorities on Friday released photos of a vehicle similar to the one they believe a suspect may be driving.
FOX News has learned that police have recovered Souers' ID. The owner of a tow shop in South Carolina told FOX News that a man picking up trash on Highway 76, close to the university, found the ID. The man took the ID to the autobody shop and police were contacted. Authorities are now searching the area for additional evidence.
Greenville prosecutor Bob Ariail also said police are expected to release a picture of a possible suspect in the case at 1 p.m. EDT Friday. Investigators are enhancing the photos of the person, who they have confirmed is a young man. The police have not stated whether the suspect is a student, but they don't think he will flee the area.
A phone bank will be set up to receive tips after the pictures are made public.
Ariail told reporters Thursday that the suspect was "candidly photographed undertaking a transaction that specifically connects him with the victim, post her death."
Police are also searching for the sheets that were missing from the Souers' when she was found on the floor of her apartment, a source close to the investigation told The Greenville News. After an extensive search, investigators fished a set of sheets from a river, but they turned out not to be hers, the source said.
Jim Souers', the victim's father, said he doesn't think the investigation is moving quickly enough.
"I would hope that everyone is doing everything possible and then some," he said in a phone interview. "Someone needs to be found."
Mourners packed the Church of the Annunziata in Ladue, Mo., Thursday to say goodbye to Souers, the 20-year-old student who was strangled to death with her bikini top last week.
As bagpipers played "Amazing Grace" and bells chimed, pallbearers carried the casket of the slain student to a waiting hearse for its interment at St. Joseph Cemetery in Manchester, Mo.
"It's great that everybody is able to support her and that her family is given this time to be able to reflect with her and be able to let her go to the Lord," her friend Alanna Dybus said.
Young women in black dresses — sorority sisters and former classmates — hugged at the memory of their friend. Eight dark-suited pallbearers in gloves, followed by immediate family, carried the casket inside. Media were barred from the funeral Mass.
"Some questions seem not to have answers," Monsignor Richard Stika said before the service. "The death of a young person, an act of violence. ... It's evident the great love people have for her. She was a lovely person filled with great spirit and faith."
Bren Souers said her daughter loved life and immersed herself in opportunities of service.
"She got so much from giving," she told the St. Louis Post-Dispatch. "It filled her up. It made such a difference and she had so much more to do ... she had so much more to give.
"I miss her so much already."
In Central, S.C., investigators said they believe they have enough evidence to build a DNA profile of a possible suspect.
Ariail said police seized evidence that could produce a DNA profile of a suspect, The Greenville News reported Thursday. Officers had also collected DNA samples from other people to compare to a possible profile. Arial said authorities may soon be able to determine whether there was a sexual assault, and that police searching Souers' computer have developed a timeline of her whereabouts up until 12:03 a.m. Friday.
Results from a rape kit could be returned Thursday, but complete autopsy results would not be released until the toxicology tests come back, which could take 10 to 14 days, the paper reported.
Police were searching Souers' computer and cell-phone records for evidence and combing through a trash bin seized at The Reserve apartment complex, where Souers lived.
Clemson student Lisa Trippany told FOX News that police asked her to access her Facebook.com Web account and identify individuals in photographs with Souers.
Investigators narrowed the student's time frame, accounting for her whereabouts up until 12:03 a.m. EDT May 26. Police believe she died around 1 a.m. Two women found Souers' body around 1:30 p.m. May 26 in her bedroom at The Reserve. She had been strangled with her bikini top and was wearing only a bra.
The junior, a civil engineering from Ladue, Mo., had been taking summer classes in order to graduate early. She was a member of Kappa Kappa Gamma sorority at Clemson and volunteered at a local charity. She was a 2004 graduate of Villa Duchesne High School, an independent Catholic girls school in suburban St. Louis, where she led the campus ministry and retreats for her class and others'.
Sam Sciortino, head of Villa Duchesne, described Souers as a well-rounded student leader.
"She was a model student, just a great young lady," Sciortino told the St. Louis Post-Dispatch.
Clemson University planned to send counselors to The Reserve Thursday night to help students deal with the tragedy, said Gail DiSabatino, vice president of student affairs at the university.
"We’re doing what we normally do and that is, we educate," DiSabatino said. "It's everyone's responsibility to take responsibility for their safety and so we're just reminding students of the things that we tell them on a very regular basis about locking your doors, about walking with others late at night."
The Central Police Department had been asked to increase patrols to The Reserve and other apartment complexes, DiSabatino said.
DiSabatino dismissed reports that Souers' death might be linked to two unsolved deaths of women in Pickens County in 1992 and 1997.
"At this point the police have given no linkage to that," DiSabatino said. "[There's] no need for concern that's unduly. At this point in time, we're looking at this as an isolated case."
One of those cases was the 1997 death of Stacy Brooke Holsonback. Her body was found floating in Lake Hartwell. Police ruled her death a homicide and officials believe more than one individual may be responsible.
Warren Holsonback, the father of Stacy Brooke Holsonback, told FOX News that the "suspicious people" connected to his daughter's death do not live in the Clemson area anymore.
"Obviously both girls were very beautiful, good students, with really bright futures ahead of them and it was just taken away from them so quickly," Holsonback said of his daughter and Souers.
FOXNews.com's Sara Bonisteel and The Associated Press contributed to this report.