A prosecutor argued in a Los Angeles murder trial Wednesday that Robert Durst, the estranged heir to a New York real estate fortune, killed Kathie Durst and her death became the basis for his “playbook” on getting away with two other killings.

A prosecutor argued in a Los Angeles murder trial Wednesday that Robert Durst, the estranged heir to a New York real estate fortune, killed Kathie Durst and her death became the basis for his “playbook” on getting away with two other killings.