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This undated handout photo provided by the Hayward Police Department whows 26-year-old female nursing student Michelle Hoang Thi Le, who disappeared Friday, May 27 from a Hayward hospital during a break in a clinical lesson. Le's family is offering a $20,000 reward for her safe return. The 26-year-old's disappearance comes 13 months after a recent nursing school graduate with the same last name disappeared outside a coffee shop in Fairfield, about 55 miles from where Michelle Le disappeared. That woman's body was found 12 days later, and the case remains unsolved. (AP Photo/Hayward Police Department)

HAYWARD -- Authorities say human remains found in a Bay Area canyon are those of Michelle Le, the missing nursing student who disappeared May 27 while taking a school break.

Hayward police late Monday said tests by the Alameda County coroner on the badly decomposed remains confirmed they were Le. Police declined to release any further information.

On Saturday, searchers discovered the remains off a dirt trail in a rugged Alameda County canyon. Police said cell phone signals from Le and a former school friend they suspect in her death had been received from the area.

The former friend, Giselle Esteban, knew Le in high school in San Diego. Esteban was arrested earlier this month and charged with murder.

Esteban, of Union City, delayed entering a plea during a hearing Monday and is scheduled to return to court Sept. 28 to possibly enter a plea.

Le's family Monday thanked Hayward Police, the KlaasKids Foundation, Team Amber Search and Rescue and other agencies that had taken part in the nearly four-month-long search.

"Please note that our family member will not be able to speak extensively on the case," said family spokeswoman Krystine Dinh in a news release.

The family asked for privacy and respect while it grieves and prepares a memorial service for her, she said.

"Please continue praying for and supporting Michelle as our family begins the journey to ensure justice in her honor," Dihn said.

The family requested that any questions related to the criminal case should be deferred to the Alameda County District Attorney's office.

Associated Press contributed to this story. Contact Rick Radin at 925-779-7166.