What is the impact of "battered women's syndrome" on a jury?

Defendant spends a good portion of her opening brief discussing "battered women's syndrome" and details the importance of testimony regarding domestic violence in helping a jury understand the potential actual and reasonable beliefs of a victim of domestic violence. Defendant implies this evidence was not offered in this case, citing cases that were overturned because expert testimony on this issue was ruled inadmissible or allowed only for limited purposes. (See People v. Aris (1989) 215 Cal.App.3d 1178, 1197, overruled on another ground in People v. Humphrey (1996) 13 Cal.4th 1073, 1089; see also State v. Gallegos (1986) 104 N.M. 247 [719 P.2d 1268].) Here, extensive expert

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