From the LA Times:

Edwin O. Guthman, a Pulitzer Prize-winning investigative journalist and editor whose aggressive pursuit of Watergate stories during the 1970s earned him the enmity of President Nixon and the No. 3 spot on Nixon's infamous enemies list, has died. He was 89.

Guthman died Sunday at his home in Pacific Palisades, USC announced. He had been dealing with complications of amyloidosis, a rare disorder involving the abnormal buildup of proteins in organs and tissues.