The bodies of 41-year-old Cecilia Meza and 17-year-old Kelsey Meza were discovered Dec. 5 when police in Monrovia were asked to check on them after the girl had missed several days of school.
Their suspected killer remains at large Sunday. Los Angeles County sheriff's officials say Nimrod Perez Guerrero should be considered "armed and dangerous."
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Investigators say the 33-year-old had an on-again, off-again relationship with the woman. Detectives haven't identified a possible motive.
Officials say the suspect may be driving a gray 2014 Toyota RAV4.