CAMM BLOG: Jury hears testimony on blood spatter


by Mary Lyons

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Updated Thursday, Mar 13 at 12:10 PM

LEBANON, Ind. -- Sergeant Dean Marks, with the Indiana State Police, finished his testimony for jurors on Sept. 6 and he said the eight blood stains on David Camm's T-shirt came from when Jill was shot on Sept. 28, 2000.

He says the eight blood stains, that are 1 millimeter in size, are typical of a high velocity impact stain. He doesn't expect to see a uniform pattern, but a similar pattern of high velocity impact stains was also found in the Bronco. This helps the prosecution's argument that Camm was near Jill when she was shot. Marks said that Camm would had to have been within three to four feet to get those eight stains.

Marks said that he was first consulted about the case on Oct. 6, 2000. He was shown pictures of the blood stains by an  ISP major where he worked in Northern Indiana. On Oct. 19, 2001 he was contacted by Stan Faith to give an official analysis of the eight stains.

Marks analyzed 149 pictures of the blood stains and actual cuts from the shirt that included some of the blood stains. Marks said it is not uncommon to study pictures and not see the actual shirt. Marks looked at the cuttings under a microscope to come to his final conclusion. He found that the stains were driven into the threads of the shirt and that only a high energy event, like a gunshot, could have got the stains.

The defense argued the eight stains on David Camm's T-shirt could not have been high velocity impact spatter because there would be many more spatters on Camm's T-shirt than just eight.

Kammen also said that there is no college degree or course that makes someone qualified to be a blood stain analyst.

Marks said there is no step-by-step criteria that is used to analyze a blood stain.

"This is a subjective, opinion based science," Marks said.

Kammen also asked Marks about using magnification to analyze the stains and Marks said it was the first time he had to use it in order to determine high velocity spatter.

"The way I was trained is to be conservative and not lock yourself in," Marks said.

For more WHAS11 coverage on the David Camm trial, click here.