Medical examiners confirmed that a body found in an Oakland estuary last year has been identified as that of a missing California woman whose son-in-law is suspected of killing her and her daughter, police in San Pablo, California, announced on Tuesday.

Que Tran, 74, and her daughter Tho Ly, 40, were reported missing on Sept. 13 by Phuc Vo, 40. Vo told police that the women left their Bay Area home following a family argument and were on their way to Southern California, the San Pablo Police Department said in March.

Detectives reported that they discovered inconsistencies in Vos statements throughout their investigation, including his account to officers that Ly left home that day in her car, according to Tuesdays news release. Detectives said they discovered surveillance video showing Vo driving Lys missing car, which was ultimately found on Dec. 5 in Oakland.