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And none burned powder particles, particulate lead as well as smoke and glasses will follow the bullet out of the barrel. this can leave a pattern on an object or if the firearm is in contact with a particular object no pattern will be left but other physical effects will be present. >> and did you conduct those tests in this case with the clothing you received and the .9mm pistol? >> i did. >> your honor may she step down again? >> she may. >> thank you. let me ask you this. stay right there if you would. gregg: this is a firearms expert called by the prosecution in a shooting case you always...

How do you do that? >> when a gun is fired, a cloud of partially burned and unburned powder particles, vaporous, inparticular lead and smoke and gases will follow the bullet out the barrel. this cloud can potentially leave a pattern on an object or if the firearm is in contact with a particular object, no pattern will be left, but other physical effects will be present. >> did you conduct those tests in this case? >> i did. >> your honor, may she step down again? >> yes, she may. >> thank you. >> so we're listening to the expert testimony there from the florida department of law enforcement, f...