The killing spree began on April 8, 1992, with the murder of 26-year-old Payless ShoeSource manager Robin Fuldauer in Indianapolis.

As this was the only case involving multiple victims, investigators believe the killer was under the impression that there was only one woman in the store.

[1] The women had stayed past the normal closing time of 6 p.m. to allow a male customer to pick up a cummerbund.

Because McCown was reported to wear his hair in a ponytail and was shot from behind, while he was kneeling to stock shelves, he may have been mistaken for a woman.

[1] On May 3, 24-year-old Nancy Kitzmiller was killed while working alone at Boot Village, a footwear shop in St. Charles, Missouri.

Although no one heard the shot, a witness did see her with her final customer just minutes before her death and this sighting helped police to create a composite drawing.

[6] The surviving victim was Vicki Webb, 35, who was shot on January 15, 1994, in Houston at the Alternatives gift shop.

[1] In November 2021, Terre Haute police announced that the I-70 killer was a possible suspect in the 2001 murder of 31-year-old liquor store clerk Billy Brossman.

Security camera footage showed a white male suspect enter the store and pull a gun on Brossman and rob the cash register.

Unlike in the I-70 murders, security footage of Brossman's killer exists and police have stated they have a person of interest in the case.

All of the murders were committed with a .22-caliber firearm and the victims were usually petite, young women with long dark hair.

The I-70 killer was described as being a white man in his twenties or thirties, 5'7" (1.70 m) to 5'9" (1.75 m) tall, thin and having lazy eyelids and sandy blond or reddish hair in 1992.

[1][6][7] In 2021, the St. Charles police department published age-progressed versions of the original composite sketch to show what the killer may look like today.