What to look for: Do they have a personal foundation? If so, who else sits on the board with them? Where do they give grants to? Does the foundation give any money to organizations that support police or right-wing causes? Are they connected to a foundation? If so, where does that foundation give grants to? Does the foundation give any money to organizations that support police or right-wing causes? Does their company have a philanthropic foundation? If so, where does that foundation give grants to? Does the foundation give any money to organizations that support right-wing causes? Are they listed as major donors to area charities? (in event programs, annual reports, on websites, etc)?
Where to find it: Google, Insidephilanthropy.com can also be useful (especially for ultra-wealthy people), Guidestar.org or ProPublica Nonprofit Explorer.