This table identifies some common items of evidence that may have been collected previously but not analyzed for the Presence of DNA evidence.

Evidence	Possible location of DNA o the evidence	Source of DNA
Baseball bat	Handle	Skin cells, sweat, blood, tissue
Hat, bandanna, or mask	Inside surfaces	Sweat, skin cells
Eyeglasses	Nose or ear piece, lens	Sweat, skin cells
Facial tissue, cotton swab	Surface	Mucus, blood, sweat, semen, saliva
Dirty laundry	Surface	Blood, sweat, semen saliva
Toothpick	Surface	Saliva
Used cigarette	Cigarette butt (filter area)	Saliva
Used stamp/envelope seal	Moistened area	Saliva
Tape or ligature	Inside or outside surface	Skin cells, sweat, saliva
Bottle, can, or glass	Mouthpiece, rim outer surface	Saliva, sweat, skin cells
Used Condom	Inside/outside surface	Semen, vaginal or rectal blood
Bed linens	Surface	Sweat, hair, semen, saliva, blood
"Though and through" bullet	Outside surface	Blood, tissue
Bite mark	Surface of Skin	Saliva
Fingernail/partial fingernail	Scrapings	Blood, sweat, tissue, skin cells
Note: When reviewing evidence, it is important to maintain chain of custody, consult with laboratory personnel, and take all appropriate precautions against contamination, including wearing gloves and changing them between handling of different pieces of evidence.

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Some or all of the content on this page was excerpted from the Special Report Using DNA to Solve Cold Cases, developed under an award from the Office of Justice Program's National Institute of Justice. See award product disclaimer.