“Gun Death” Black Widow

The classic, find a man with money, marry him, become his beneficiary, and kill him:

When Isao Kakehi, a 75-year-old retired salaryman, was found dead on the floor of his home last December, the police at first believed the cause to be heart failure.

But a sharp-eyed detective grew suspicious. He noticed that Mr. Kakehi, a longtime widower, had suddenly remarried the month before his death, and to a woman he had just met through a dating agency. When a test of the dead man’s blood revealed lethal cyanide, the police began an investigation of his bride, Chisako, now 68, on suspicion of murder.

There were five others who met a similar fate to the same woman.

Hey, but no guns were involved!

H/T Whipped Cream Difficulties