SAN FRANCISCO (AP) _ The FBI said Tuesday it has pieced together the escape route into Canada of a martial arts expert sought for questioning in the deaths or disappearances of 22 people, some of whose bones have been found at a California mountain hideaway.

Robert Gast, special agent in charge of the San Francisco FBI office, traced Charles Ng's trail as far as Sudbury, Ontario, on June 14, where a man resembling Ng was seen in a hotel restroom shaving his sideburns and eyebrows, and also in a ticket line at a Greyhound bus terminal.

The FBI says Ng, 24, was the companion of Leonard Lake, who swallowed poison and died June 6 in the custody of South San Francisco police.

Since then, officers have dug up 45 pounds of human bones at Lake's mountain home in Calaveras County, 150 miles east of San Francisco, and have tied Lake or Ng to 22 missing or dead people.

In another development, San Mateo County authorities said they'll take disciplinary action against Lake's former wife, Claralyn Balazs, if she is proved to have recruited two girls to pose for pictures by Lake while she was an instructional aide at a juvenile facility.

Police say pictures of two girls from the school near Belmont were found in Lake's house.

Lake had been arrested by South San Francisco police for investigation of stealing a $75 vise from a lumberyard.

Ng fled during the commotion.

He returned to his San Francisco home, then went to a Bay Area Rapid Transit station, and next was seen at the San Francisco International Airport buying a ticket to Chicago. The FBI said Ng checked into the Chateau Hotel in Chicago on June 4 under the name of Mike Kimoto, presenting a California identification card and Social Security card in that name.

Ng left Chicago four days later and crossed the border from Detroit into Windsor, Ontario, the FBI said. His path led to Chatham, Toronto, and Sudbury by the next evening, and then, after a five-day gap, came the sightings at the Sudbury hotel and bus station, the statement said.

Ng is a martial arts expert and is considered armed and extremely dangerous, the FBI said.

In addition to the lumberyard theft and the Calaveras County case, Ng is wanted by San Francisco police in connection with a July 1984 burglary, the FBI said.