He was the first person to be added as an eleventh name on the FBI Ten Most Wanted List, in connection with the 1961 murder of Joan Caudle in Portland, Oregon.

[3] On June 8, 1961, Portland police received a phone call from a local housewife whose dog had brought home a human foot in a paper bag.

An autopsy on the remains found that the veins and arteries were completely drained of blood and that it had happened shortly after death, ruling out the possibility that this was a buried corpse someone had dug up and dismembered.

Police then found a witness, a local woman who was a habitual barfly and had a string of arrests for public drunkenness and disorder.

After police showed her a photograph of Joan Caudle, the woman said that was definitely the same individual from the bar, adding that she was lucky she hadn't been the one to go home with Marquette.

[5] A background check found that he had two previous arrests, in June 1956 for attempted rape, and in August 1957 when he robbed a Portland gas station and spent a year in jail.

When asked what became of Joan Caudle's head, Marquette led police to a river bank near Oaks Park in Portland where it was fished out of some rotting timber along the edge of the water.

[1] In April 1975, a fisherman discovered mutilated human remains floating in a shallow slough in Marion County, Oregon.

Detectives determined the remains were those of 37-year-old Betty Wilson, a North Carolina native who'd led a hard life of poverty and had 7 children since marrying at the age of 16.

With all of her children in foster care, Wilson stowed away in the back seat of her sister's car one day to begin a new life far away from North Carolina and had been living with her in Salem.

Wilson's husband was the initial and obvious suspect, but it was quickly verified that he'd been working in North Carolina at the time and could not possibly be responsible for a murder that happened on the other side of the country.

They searched both inside and outside the mobile home where Marquette was living and uncovered several small but damning pieces of physical evidence that tied him to the murder of Betty Wilson.

While he claimed that he chopped up Joan Caudle because he didn't have a car to dispose of her body, this time he had a more than adequate pickup truck, yet he still decided to dismember Betty Wilson.

Criminal psychiatrists working with Marquette came to the conclusion that he was a perfectly normal, socially adjusted individual unless women turned him down.