ROCHESTER, N.Y. -- By order of a judge, Richard Wilbern, who's accused in the 2003 Xerox Federal Credit Union robbery and shooting death of another man, will remain behind bars.

The type of DNA testing used by the Department of Justice was at the center of Wilbern's detention hearing Wednesday. The 56-year-old is charged with the Xerox Federal Credit Union robbery and shooting death of Raymond Batzel in 2003. Another customer was shot and injured.

Assistant U.S. Attorney Douglas Gregory said using low copy number, or LCN, a DNA profiling technique, they determined DNA found on an umbrella left at the scene by the suspect could match only one person in 6.8 trillion. That match, he said, was Wilbern.

Gregory said when the DNA was originally obtained in 2003, Monroe County did not have the capabilities to test it.

“Skip ahead several years later, the office of the chief medical examiner in New York City had obtained accreditation to do the low copy number testing, which to detect essentially touch DNA,” Gregory said. “They are accredited through the state of New York. It was based upon those tests that we were able to get a profile and then of course in 2016 compare that profile with the profile of Richard Wilbern, and it was a match of all 15 locations.”

Defense attorney Anne Burger refuted the reliability of LCN in court. She brought in an RIT professor to talk about the technique. He said it can produce a false positive and said it’s good for identifying suspects, but shouldn’t be used for convictions.

To continue connecting Wilbern to the umbrella, Gregory said it was determined, by the Japanese lettering on the umbrella, it was made in Tokyo. He said Wilbern traveled to Japan 14 times during the five years prior to the robbery, engaging in drug dealing. Burger, however, said it can’t be determined where the umbrella was sold.

Gregory said not only was Wilbern a disgruntled Xerox employee at the time of the robbery, he knew the credit union well. Gregory said Wilbern made more than half a dozen deposits at the credit union between April and July 2003. He said after the robbery, Wilbern didn’t go back and his account was later closed. He also said Wilbern had a discrimination lawsuit against Xerox which he later lost. Gregory says Wilbern was in financial dire straits when the robbery occurred.

Burger, however, said no tellers had come forward saying they recognized him as a frequent customer and there had been hundreds of lawsuits at the time against Xerox claiming discrimination.

The rest of the hearing was dedicated to proving whether or not Wilbern is a flight risk and a danger to society. While Burger said Wilbern’s family is supportive of him, Gregory pointed out Wilbern traveled to Japan and other places while on probation during prior convictions without letting his probation officers know.

He's also facing charges of unlawful possession of firearms after four different types of firearms were found at his girlfriend's home in September 2016.

“Mr. Wilbern was a convicted felon,” Gregory said. “Therefore he was unable to possess any type of ammunition or firearm. Not only did we find four semi-automatic firearms at the residence he shared with his girlfriend, but there was a separate residence at 766 Hudson Ave, where he not only had hundreds of rounds of ammunition, but a loaded shotgun along with body armor.”

In the future, Gregory said we will hear from people who will identify Wilbern in surveillance pictures taken during the crime. He added others will also testify they had seen him with the FBI jacket and the wig worn that day. However, the defense questions why they didn’t come forward until now.

The next court date is scheduled for April.