INDIANAPOLIS, AUG. 15 -- Federal marshals searched today for a member of the Chilean equestrian team named in a $10 million civil suit alleging he helped torture and murder 72 people.

The suit, brought by Carmen Hertz, claims her late husband, Carlos Berger, was one of the 72. The suit was filed Friday in U.S. District Court here, because, Hertz's lawyer said, "here is where we think we can find him."

Marshals here said they have been searching since Friday for Sergio Arredondo, who retired from the Chilean army as a colonel. He came here last week to compete in the Pan American Games.

The suit alleges he violated international law through "the torture and murder of 72 individuals in the town of Calama in 1973," Hertz's lawyer told United Press International.

The State Department denied a visa Aug. 9 to another Chilean, Francisco Zuniga, who wanted to compete in pistol shooting. The department alleged he helped torture and murder opponents of Augusto Pinochet's Chilean regime.

Hertz, reached in Santiago, said her husband, a journalist, was killed by firing squad in Calama, a copper mining town, in far northern Chile about one month after Salvador Allende's government was overthrown. The lawsuit alleges Arredondo was second in command of an army group that murdered Allende's supporters.

Berger was one of 26 people taken out of a jail, executed in the desert and buried in a mass grave, the suit alleges. The suit also claims 46 other people were similiarly executed.

Jesus Posse won the single sculls rowing for Uruguay's first gold medal, and the United States won a gold in men's lightweight crew.

Posse, 21, rowed the 2,000 meters in 7:41.15 to beat Mexico's Joaquin Gomez by 4.14 seconds. Cuba's Elexey Marrero led until the last 750 meters and finished third. Daniel Brisson of the Bronx, N.Y., the 1985 national singles champion, never threatened and placed fourth.

The U.S. men's lightweight four-man crew without coxswain defeated Mexico, Canada and Cuba to win one of the eight gold medals in rowing. The oarsmen in the gold medal boat were Russell Lane of Kenilworth, Ill., Dan McGill of Corvallis, Ore., Eric Rosow of West Hartford, Conn., and Don Tower of Media, Pa.

Mexico's Martha Garcia and Ana Gamble, spurred by their coach's promise that a gold medal performance in the double sculls would earn them a trip to the world championships next week, defeated the U.S. and Canadian boats. Jennie Marshall of Philadelphia and Holly Kays of Corvallis, Ore., finished second.

In men's pair without coxswain, Brazilian brothers Ricardo and Ronaldo Carvalho let the other boats fight it out for 1,000 meters before opening a boat-length lead in the sprint to claim a gold a medal.