While Ted Cruz is locked in a deadly serious struggle to win the Republican primary Tuesday in Indiana, where a loss could spell doom for his shot at the presidential nomination, one reporter had a somewhat less serious, if no less deadly, question for his wife, Heidi: Is the Texas senator the Zodiac killer?

The joke that Cruz is actually the notorious serial killer that terrorized San Francisco in the late 1960s and early 1970s, which is a popular meme online, broke into the mainstream Saturday night after comedian Larry Wilmore riffed extensively on the conspiracy theory during his comedy set at the White House Correspondents’ Dinner.

Heidi took the question in stride. “Well, I’ve been married to him for 15 years and I know pretty well who he is, so it doesn’t bother me at all. There’s a lot of garbage out there,” she told Yahoo News when asked for her reaction to Wilmore's routine. “It’s amazing how a lot of people are swayed by it,” Heidi continued. “Part of it is, the news media is 24/7 and they don’t let up.”

This is, of course, exactly what the wife of the Zodiac killer would say. But in this case, the man Donald Trump calls “Lyin’ Ted” is not lying: Cruz was born in 1970, right in the middle of the period when the infamous Zodiac killings took place. (The serial killer’s identity was never discovered, but it is safe to assume he was not a baby.)

Still, some have suggested the signs are there, if one simply knows where to look:

Such were the indignities Cruz’s campaign suffered Monday, just one day before the critical Indiana primary. In addition to confronting rumors that he is a serial killer, Cruz also faced off with a group of pro-Trump supporters calling on him to drop out of the race and chanting “Do the math!” Meanwhile, at least one report indicates his own staffers are beginning to panic about the possibility that their candidate will lose the Hoosier State and fail to stop Trump from securing the 1,237 delegate majority he needs to clinch the Republican nomination. (The latest NBC News/Wall Street Journal/Marist poll, released Sunday, puts Trump a whopping 15 points ahead of Cruz.)

Cruz’s falling popularity comes just days after he made several attempts to recapture the public’s imagination, tapping Carly Fiorina as a running mate and announcing an alliance of sorts with John Kasich. He has seen little increase in polling since pre-emptively declaring his vice president, and his truce with Kasich, such as it was, quickly fell apart.

His poll numbers aren’t the only thing that’s dropping, either: