The last time a woman accused of murder got this much attention in Australia was in 1980 when Lindy Chamberlain (immortalized by Meryl Streep in “A Cry in the Dark”) claimed a dingo stole her baby. This time, a very different Australian mom named Erin Patterson stands accused of poisoning her former in-laws by putting death cap mushrooms in a beef wellington lunch she served them in July. The case has transfixed Australia, sucking Ms. Patterson into a firestorm of speculation about whether she’s a cold hearted poisoner, or just very unlucky.