CAHORS, France (AP) _ Police, confounded by what seems like the perfect murder, will take fingerprints this weekend of all 200 adults in the village of Montgesty, officials said Thursday.

Investigators have tried for nearly a year to find the murderer of Raymonde Martignat, an elderly village woman found bound and suffocated to death with a rag Nov. 22, 1989, in a shed near her home.

The motive for the crime continues to escape Investigating Judge Charles Pinarel, police sources said.

Police found the victim's house ransacked, but her money, checks and identity papers were not taken.

Village Mayor Rene Migayrou said the judge asked him to call all adult villagers to the municipal auditorium so police could fingerprint them.

Migayrou said he had received no complaints ''and lots of people think this should have been done sooner.''

The mayor said he thinks the murderer is not among the villagers and this operation will silence the rumors running through town for the past year.

Villagers whose names start with A to L are to be fingerprinted Friday, and those with names starting with M to Z get fingerprinted Saturday, police said.