Possible Zodiac attack in Mill Valley on Isobel Watson

KPIX-TV news footage from April 19 1972 with reporter Pat O'Brien in Mill Valley featuring an interview with Napa County Sheriff Earl Randall, who states that a recent knife attack on Isobel Watson on Pine Hill Road (on April 7) is of some interest but isn't necessarily the work of the Zodiac killer. Also includes views of the neighborhood where this attack occured. Opening graphic designed by Carrie Hawks.