SANFORD, Fla. -

Judge Debra S. Nelson said she expects the state to rest its case against George Zimmerman and the defense is expected to begin on Friday, with no court being held on the Fourth of July.

[Chat recap:  Tony Pipitone inside courtroom]

After Nelson saying she wanted the state to rest by Wednesday, she recessed court at 5:30 p.m. Wednesday until 8:30 a.m. Friday. Jurors will remain sequestered during the holiday break.

Nelson denied the defense's request to adjourn Friday so it could take the deposition of Benjamin Crump, the attorney representing Trayvon Martin's parents.

Attorney Don West said the defense objects to Crump's deposition schedule of Sunday at 6 p.m. West asked to take the day off from court on Friday so it can depose Crump instead.

Nelson said she was unwilling to give the day off of court, citing several reasons, including the fact that the jury is sequestered.

Florida Department of Law Enforcement DNA analyst Anthony Gorgone was the first witness of the afternoon session on Wednesday as he described DNA conditions necessary for analysis. He also testified about his findings on Zimmerman's gun. On the grip, Gorgone said he found a mixture of DNA but Zimmerman was the major contributor.

Gorgone's DNA findings appear to contradict Zimmerman's claim that Martin grabbed the gun. Gorgone said he also scraped under Martin's fingernails and only found Martin's DNA, not any of Zimmerman's DNA.

Gorgone also said he didn't find any Zimmerman DNA on hoodie worn by Martin, but did find Zimmerman DNA on the front hem on the sweatshirt Martin was wearing underneath the hoodie.

Martin's blood was found on the front right upper of Zimmerman's jacket, according to Gorgone.

During cross-examination, defense attorney Don West asked if factors can degrade DNA. Gorgone said wet evidence should be dried before storage to preserve DNA. The defense claims the evidence was stored wet. Gorgone said the evidence being sealed wet in plastic bags could have caused the DNA to degrade.

Earlier Wednesday, Zimmerman's professor testified after Nelson ruled that Zimmerman's school records showing his criminal justice courses, police job application and an application to ride around with Sanford police officers will be allowed in his second-degree murder trial.

Nelson overruled a defense objection, trying to keep from evidence the fact that Zimmerman took a college criminal justice course that included course work on Florida's self-defense law, along with application records.

Nelson heard the arguments from attorneys Wednesday morning outside the jury's presence. The prosecution said school records show Zimmerman had knowledge of the law, though he claimed in a television interview played for jurors Tuesday that he didn't.

The defense said the textbook used in Zimmerman's class doesn't mention "stand your ground" and the state needs proof Zimmerman was in class the day it may have been taught.

Despite the defense trying to block his testimony, U.S. Army Capt. Alexis Carter, a military prosecutor who taught Zimmerman's Seminole State College criminal litigation class in spring 2010, took the stand on Wednesday.

Carter waved at Zimmerman and said, "How are you doing, George?" before beginning his testimony. Carter said Zimmerman earned an A, describing him as "one of the better students in the class." Carter said he taught self-defense law, but he added that it was not Florida-specific.  He did, however, teach about the "stand your ground" law.

Zimmerman had previously said on his interview with Sean Hannity that he had never heard of the "stand your ground law" before the shooting.

Carter, who began working for Orange County public defender in November 2009 while teaching the course, said self-defense was "constantly iterated" and was something "students really want to know about."

In cross-examination, West asked Carter to give jurors a lesson on "stand your ground." The state objected.

"The fact that there were injuries tends to show a person had a reasonable apprehension of fear," Carter said.

West then had Carter agree injuries are not necessary to justify deadly force and injuries support person had reasonable apprehension of fear.

"Someone initially feel that they are being threatened and they countered that with a force that was disproportionate to the force that was directed towards them, that would be imperfect self defense claim," Carter said.

During redirect, the state broached how self-defense applies to someone who "provoked" the encounter. The defense objected and the judge sustained it.

The state then called Jim Krzenski of Sanford Police Department administrative services. Krzenski verified Zimmerman wrote in his March 15, 2010 ride along waiver that he wanted to "solidify chance" of law enforcement career.