But officials briefed on the investigation told ABC News the suspected shooter demonstrated a misogyny that was far more extreme than any of his political leanings.
In that, he follows a bleak pattern among mass shooters.
"There are red flags," Jacquelyn Campbell of the Johns Hopkins University School of Nursing and one of the leading domestic violence researchers in the nation told ABC News. "There are things about these shooters' behavior before these things happen that I think we as a country need to think hard about in terms of trying to make these things less frequently happen."
After many mass shootings, information comes out that links the shooter to gender-based and domestic violence -- and many massacres, like this one, include female family members, partners and ex-partners among the victims.
Ten of 2018's 20 mass shootings, as defined by ABC News, were instances of domestic violence, including against intimate partners or family members, a January ABC analysis showed. One of the victims of the Dayton shooting was Megan Betts, the alleged shooter's 22-year-old sister.