LOS ANGELES (CBSLA.com)  —  Authorities announced the arrest of a 24-year-old for the slaying in July of a 64-year-old woman, her grandmother.

Paula Montoya’s body was discovered July 21 at her home in the 6600 block of Pine Avenue in Bell during a welfare check by police, according to the Los Angeles County Sheriff’s Information Bureau.

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She had last been seen alive two days earlier during a visit with family members, officials said.

(credit: Los Angeles County Sheriff's Department)

(credit: Los Angeles County Sheriff’s Department)

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Detectives have arrested Montoya’s granddaughter, 24-year-old Sarah Montoya, as a suspect in the case, according to the bureau. Several days ago, officials named the granddaughter as a person of interest in the cast and said she was missing along with her four children, ages 1-9.

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The dead woman was described as an active member of her local church, a doting grandmother of six children and great-grandmother of four children.

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LASD is planning a news conference on Monday at 10 a.m. to provide more details in the case.