While jury selection was scheduled to begin today in a second trial for the former Manhattan bouncer accused of raping and killing 24-year-old Imette St. Guillen back in 2006, a defense attorney says it has been delayed following a new twist involving DNA evidence.

Imette St. Guillen was 24 years old and pursuing a graduate degree in criminal justice studies when she disappeared from a Manhattan bar late one night back in February 2006.

Many hours later, her body was found dumped in a lot in East New York. She'd been brutally assaulted, her hands and feet bound.

The Brooklyn District Attorney says 44-year-old Darryl Littlejohn abducted and killed her that night.

In the three years since, Littlejohn has been convicted of kidnapping and assaulting another woman – a crime that already has him spending 25 years to life behind bars.

His trial on first-degree murder charges in St. Guillen's death is set to begin.

Investigators say items that link Littlejohn to St. Guillen that night include plastic ties used to tie her up, a quilt in which her body was wrapped, and a snow brush found beneath her body.

However, according to Littlejohn's attorney, before jury selection can begin, some legal issues need to be resolved. Among them is the fact that the medical examiner claims a blanket that prosecutors say ties Darryl Littlejohn to the murder contains DNA from Littlejohn's brother, Reggie Harris.

Harris died in 1994. However, according to Littlejohn's attorney, the blanket's manufacturer says it was not made until 1998.

Further testing is needed to conclusively tie the DNA to Harris. As a result, jury selection has been delayed until next month.

Littlejohn's lawyer argues the evidence has been compromised.

"The evidence itself, the plastic ties, the quilt, the snow brush, were moved from lab to lab. They were transported by detectives involved in the case. At any point in time the evidence could have been tampered with," said David.

It's a claim the police department vehemently disputes.

The defense also plans to implicate the owner of The Falls, Daniel Dorrian, who she says held up the investigation by lying to police.

Dorrian's lawyer didn't return NY1's calls and The Falls has since shut down.

Activist Jeff Ragsdale helped move for changes to the city's nightlife regulations after the death of St. Guillen.

"If you lose a daughter to a brutal crime like this, there is never closure. That's why the New York nightlife scene put in more laws into motion to prevent this from happening with security cameras and background checks of bouncers. It should have been done way before this and a beautiful person died because of this," said Ragsdale.

The St. Guillen family lawyer says Imette's mother and sister will come to New York from their home in Boston for parts of the trial, which is expected to last about a month.