NEW ALBANY, Ind. -- An expert for the prosecution did not provide conclusive proof Thursday that gunshot residue was found on accused murderer David Camm.

DAVID CAMM TRIAL Slideshow: Images From Trial Vote: Do You Agree With Verdict? Vote: What Sealed His Fate? Vote: Camm's Testimony Hurt Or Help Case? Your Thoughts: Reaction To Verdict See Who's On The Jury Who's Who In Camm Trial VIDEO 4/11: Family Reacts To Sentencing 4/11: Jurors React To Sentencing Exclusive:Camm Home Videos Camm Sentenced Thursday 3/20: Siblings Speak Out 3/19: Camm Describes CPR 3/19: Detectives Grill Camm 3/18: Jurors Speak Out 3/18 - Videotape: Police Interrogate Camm 3/18:Hear Camm's Call to Police 3/18:Emotional Reaction To Verdict 3/17:Camm's Sister Reacts To Verdict 3/17: Live Report Following Verdict 3/15:Lawyers Present Closing Arguments 3/13:Lawyers Prepare Closing Arguments 3/11:Camm Wraps Testimony 3/8:Camm Grilled About Affairs 3/8: Camm Acts 'Strange' On Stand 3/7:Camm Sobs On Stand 3/6: Prosecutors Grill Defense Expert 3/5: Defense Expert Cross-Examined 3/4: Lawyers Talk About Upcoming Camm Testimony 2/28: Camm's Uncle Testifies 2/27: Alarm Company Official Takes Stand 2/21: Prosecutors Rest Case 2/21: Defense Grills Englert -- Again 2/20: Defense DNA Expert Testifies 2/19: Expert's Credibility Questioned 2/14: No Gunshot Residue Found 2/12: Camm's T-Shirt Scrutinized 2/8: DNA Expert Testifies 2/7: Jurors Look At Bronco 2/6: Did Camm Contradict Himself? 2/5: Kimberley Camm's Last Moments 1/31:Camm Trial Continues 1/30: 9 Women Take The Stand 1/29: Camm's Ex-Lovers Testify 1/28:Jury Visits Crime Scene 1/24:Jurors Tour Gymnasium 1/22: Evidence Technician Takes Stand 1/17: Jurors Watch Videotape 1/15: Investigator Takes Stand 1/14: Prosecutors Reveal Evidence 1/9: Hear What Camm Said

The former Indiana State Police trooper is charged with killing his wife, Kimberly, and his two children, Bradley and Jill, in their Georgetown, Ind., house in September 2000.

NewsChannel 32's Abby Miller reported that research scientist Wayne Niemeyer took the stand Thursday.

Neimeyer testified about particles found on the clothing David Camm was wearing the night of the murders.

He said that only two of the three particles needed to make up gunshot residue were found on Camm's clothing, Miller reported.

Brass and lead particles were found on Camm's sock, and in the pocket of the shorts he was wearing.

"You'd better have more than one piece of in a sock and an old piece in a pocket to prove that he was the shooter," defense attorney Mike McDaniel said.

Faith said that the particles could have been knocked off.

"If you wash your hands, if you go to a gym and play basketball and sweat, it comes right off. That's why there's no so much here," Faith said.

Neimeyer (pictured, below right) testified that there were more brass particles found on his clothing than would be produced by a gunshot.

McDaniel maintained that his client obtained the particles from restoring an old car.

Miller reported that prosecutors are not using this evidence as conclusive proof that Camm committed the murders, but are using it as a means not to exclude him as a suspect.

"We could not convict a person -- we couldn't even begin to charge a person based on this kind of evidence, but it does not exclude him," lead prosecutor Stan Faith said.

The prosecution's last witness, a blood-splatter expert, is expected to take the stand Friday, Miller reported.

Faith said that he will provide undisputable evidence that the pattern of blood on Camm's T-shirt proves that Camm is the shooter, Miller reported.

"If you have this kind of blood impact on your T-shirt, there's only one way you can get it," Faith said. "That's in the presence of a gunshot."