A woman whose body was found in the trunk of her car had been missing for more than a week, police said Sunday.

Relatives reported 22-year-old Denise Figueroa of Los Angeles missing on Feb. 28, said police Officer Sam Park.

Her body was found Saturday afternoon after an anonymous letter was faxed to KTLA-TV, telling authorities where to look.

Daniel Sanchez, Figueroa's uncle, told KABC-TV late Saturday that the person his niece had last been seen with called her father, sounding desperate and saying "I didn't mean to hurt her. I'm sorry, I'm sorry."

The fax, addressed "To whom it may concern" and signed "someone trying to help," named two suspects, saying one man killed Figueroa and the other helped clean up the vehicle her body was placed in. The fax also gave an address in the San Fernando Valley where the car was parked.

One of the men named in the fax was arrested on March 3 on an unrelated charge and is jailed in lieu of $150,000 bail.

County coroner's Lt. Cheryl MacWillie said an autopsy likely be performed on Monday to determine how Figueroa died.