"Our investigation has led us to search the area where the arm was found," Mission police Lt. Martin Garza said Friday.
An Hidalgo County grand jury indicted Lugo's husband, Pedro Lugo, and stepson, Javier Lugo, on murder charges Thursday. Javier Lugo also faces two counts of tampering with evidence. The two were booked into the Hidalgo County Jail on Thursday afternoon and are being held without bond. A jail official declined to say whether they had attorneys.
Willacy County Sheriff Larry Spence told the Valley Morning Star in Harlingen that authorities will use DNA tests to determine whether the arm could have belonged to the missing woman.
Court records indicate Josefina Lugo had filed for divorce July 10.
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