ORLANDO, Fla. -- Scientists said air samples from the car trunk of Casey Anthony, who is accused of killing her 3-year-old daughter Caylee, contain evidence of body decomposition.

---

IMAGES: Wild Ride In Orlando
IMAGES: Casey Anthony, Baez
VIDEO: Casey Anthony, Attorney Hold News Conference

---

Caylee disappeared in June but has not been found.

Authorities on Friday released a report from a Tennessee lab that found five compounds consistent with body decomposition. Tests found evidence of decomposition on a hair strand found in the trunk, described as "microscopically similar" to one found on Caylee's hair brush.

Casey Anthony has pleaded not guilty in the death of her daughter.

New Attorney Joins Team

A high-profile attorney has joined the defense team of Casey Anthony.

Terry Lenamon, of Miami, will help defend Anthony, who faces first-degree murder charges.

It is not yet known if prosecutors will seek the death penalty against Anthony, whose current attorney, Jose Baez, is not qualified to handle a capital murder case, Local 6 News reported.

Lenamon recently told Local 6 News he had no comment about representing Anthony.

Child Neglect Charge Dropped

Orange County officials will not pursue child neglect charges against Anthony because she has been charged with first-degree murder.

The child neglect charges were based on the assumption that Anthony's daughter, Caylee, was still alive, according a court media release.

Anthony has also been charged with aggravated manslaughter and four counts of lying to investigators.

Lawson Lamar, the state attorney prosecuting the case, declined further comment.

Officials said in the release that they don't wish to feed a media frenzy that would lead to a change of venue.

Caylee was last seen in mid-June, but her mother did not report her missing until mid-July. A body has not been recovered.

A national search for Caylee continues.

Watch Local 6 News for more on this story.