When the soon-to-be-ex-wife of one of his clients threw her husband’s entire collection of tropical fish out on their front lawn, Mark B. Sandground Sr. told his client to collect and freeze them immediately for use as evidence at trial. He once advised another well-heeled client seeking a divorce to serve her husband nothing but frozen food for dinner for three months, to encourage the speedy end to the soured marriage. Sandground, a Washington-area divorce lawyer (and UVA Law graduate) who drew media attention for his Machiavellian embrace of winning at all costs, died Dec. 30.