During the 1997-98 season, Donaldson co-anchored a special edition of "PrimeTime Live" with Judd Rose in which the two men shared their personal experiences with cancer; conducted an exclusive interview with Dick Morris, President Clinton's former political adviser; and interviewed Sgt. Maj. Brenda L. Hoster, who accused the U.S. Army's highest-ranking enlisted soldier of sexual assault. Donaldson also updated his report on the assassination of Martin Luther King Jr., posing the theory that the killing was a conspiracy possibly involving the U.S. government.
In June 1997, Donaldson, along with Diane Sawyer, co-anchored an episode of "PrimeTime Live" dedicated to the mystery of TWA Flight 800. In the episode, Donaldson interviewed James Kallstrom, head of the FBI in New York; Secretary of the Navy John Dalton; and Bernard Loeb, the NTSB chief investigator, who told "PrimeTime" he believed the crash could have been prevented and could happen again.
During the 1995-96 season, Donaldson investigated a neo-Nazi subculture in the Army's elite 82nd Airborne Division; investigated a so-called herbal stimulant called herbal ecstasy; examined organizations that have tax-exempt status even though they make millions of dollars in profits; investigated steroid use by Chinese Olympic swimmers; interviewed Colin Powell about the GOP race for the 1996 presidential nomination; investigated the rape of a teenage girl in Okinawa by three U.S. servicemen; interviewed Capt. Scott O'Grady; and was the first to interview Clayton Lonetree, the first U.S. Marine to be convicted of espionage after Lonetree fell in love with a Soviet woman.
In the 1994-95 season, he reported on one of the worst friendly fire accidents in U.S. history, which occurred over northern Iraq, killing 26 people. Donaldson investigated just what happened when two U.S. Air Force fighter planes shot down two U.S. Army helicopters, and in an exclusive interview, spoke to the only man accused of making a mistake, Air Force Captain Jim Wang. Wang has since been acquitted of all charges. Also, Donaldson profiled Sen. Bob Dole and traveled to northern Italy, where Dole was injured during World War II. In addition, Donaldson talked to the senator about his run for the presidency in 1996. Throughout the year, Donaldson conducted numerous investigations into mismanagement, fraud and waste by our federal government, revealing staggering sums of squandered U.S. taxpayer funds.
During the 1993 and '94, Donaldson tracked down Nazi war criminal Erich Priebke in Bariloche, Argentina. Priebke was extradited to Italy and tried for his crimes. Donaldson investigated the criminal history of Richard Allen Davis, alleged kidnapper and murderer of Polly Klaas, and how the Davis case fell through the cracks of the California criminal justice system.
In 1992 and '93, Donaldson investigated a U.S. naval air station in Bermuda that appeared to remain open as a vacation playground for military brass at the expense of taxpayers. He investigated how, for 40 years, the six U.S. tobacco companies waged campaigns to obscure the truth about smoking hazards and fend off regulation; investigated a controversial entrepreneur who oversaw a high-volume cataract clinic and allegedly performed unnecessary surgeries costing taxpayers hundreds of millions of dollars; and took an inside look at the hunt for billionaire fugitive cocaine trafficker Pablo Escobar.