Investigators have said Lovette and another man, Demario Atwater, kidnapped the 22-year-old UNC student body president from her Chapel Hill home on March 5, 2008 and then drove her around in her SUV to various ATMs in Chapel Hill and Durham to withdraw cash from her accounts.
They said the pair then killed her and dumped her body on a Chapel Hill street.
Earlier this year, Atwater took a plea deal on federal charges related to the Carson's kidnapping, carjacking and murder, and is currently serving a life sentence.
In Lovette's trial Tuesday, the defense tried to cast doubt on testimony about footprint and fingerprint evidence.
SBI hair and fiber analyst Jennifer Remy described in detail her examination of Carson's Toyota Highlander and what she found there.
She told the jury she checked DNA evidence found on a rear floor mat of Carson's car. Remy said she also analyzed the interiors of a PT Cruiser driven by Lovette, and a GMC Jimmy driven by Atwater.
Lovette's attorney Karen Sheilds-Bethea asked Remy how many items she examined that related to Lovette and Carson and Remy's replied between 90 and 100.
"And there were no fiber matches with Mr. Lovette," Sheilds-Bethea asked.
Remy said there was not. She also said there were no hair matches.
D.A. Jim Woodall asked if that was unusual, Remy said it happens a lot during investigations.
Examining SBI analyst Natassha Robinson, Woodall asked about the lack of fingerprints.
"If a person is wearing gloves would they leave fingerprints neccessarily?" asked Woodall.
"No, if they're wearing gloves, it's a good possibility they would not leave fingerprints," Robinson responded.
In earlier testimony, it was revealed detectives found gloves during several searches.