It's not you until you tie it to your identity. I leave "DNA" all over; people cannot match it to me unless they have an existing sample that is definitely from me.
http://www.bbc.co.uk/news/uk-england-somerset-36245888
A man killed a girl. His DNA was gathered at the scene. 26 years later his daughter committed a minor crime, and had her DNA taken as part of her arrest, which led them back to him.