DNA Showcases: (1) Michael Edwards Jr., 28, was arrested in July after an incident at a Giant food store in Gaithersburg, Md., in which he followed a customer to her car and sprayed her from a bottle whose liquid was part semen. (2) Michael Lallana, 31, was arrested in Santa Ana, Calif., in August and charged on two separate instances of "discharging" his semen into a female co-worker's water bottle. (3) William Black, 28, was arrested at a Sarasota, Fla., Wal-Mart in September after he grabbed a Sports Illustrated swimsuit issue off the magazine rack, retreated to another aisle, and masturbated, leaving semen on the floor. (Black said he had been overcome looking at all the "hot girls" among Wal-Mart shoppers.)


