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It can also lead police right to your front door if you leave it at a crime scene.
Right now in Washington, your DNA can only be collected and put in the national database if you are convicted of a crime, but there's a push in Olympia start the collection process much earlier.
Some lawmakers want to seize your DNA at arrest. That would get it in the system much earlier and while you're awaiting trial, it could be used to search the database to see if it matches any unsolved crimes.
"DNA is the truth," Jayann Sepich told a State House committee on Tuesday. "It identifies the perpetrators. It exonerates the innocent." Sepich knows the power of DNA evidence. It was used to solve the murder of her 22-year-old daughter Katie.
"She had been brutally raped, beaten, strangled and set on fire. There are no words for me to explain the agony. I...