Aaron Mahnke

He had been shot four times.

Betty Jo Booker's body wasn't found for many hours after that.

Her body was three miles from Paul's.

At 15, she was the youngest of the killer's victims.

A fourth attack broke from the established pattern, though.

On May 3rd, Virgil and Katie Starks were at home at their farmhouse.

Virgil was sitting in the living room reading the paper when two bullets entered from the window behind him, catching him in the back of the head.

When his wife Katie ran into the room to investigate, she too was shot twice, but was able to escape and run to a neighbor's where she told them to call the police before passing out.

And like I said, this crime was different from the three that preceded it.

For one, the Starks were markedly older than his previous victims, 37 years of age to be exact.

They were also shot with a .22, a departure from the .32 caliber that the killer had used in previous murders.

And of course, he didn't find them parked.

They were safe at home.

Until they weren't.

Four brutal attacks in four months time.

There wasn't a term for it at this point in history, but today we've built an entire genre around the concept.

It seems that Texarkana had a serial killer.

It was the spring of 1946, and the tiny town of Texarkana, Texas, was paralyzed by a deep terror.

A Fort Worth Star-Telegram article described a populace with drawn shades and doors double-barred.

Neighbors armed themselves and invited guests to stay the night for extra security.