<p>April 28, 2003 -- Authorities had located the remains of eight-months pregnant Laci Peterson - possibly wrapped in plastic and weighted down - on the ocean floor weeks before she and her baby washed up on shore, but a tanker apparently dislodged them before they could be recovered. "The waves came up, and we couldn't go down [in time]. I can't tell you the frustration we felt," Modesto, Calif., Police Chief Roy Wasden told the Oakland Tribune.</p>