WARNING: Image below may be disturbing to some readers.

It’s a mystery: Parts of two legs were found together in Williamsport, along the Susquehanna River, in May. Here’s what we know – including a picture of what the victim was wearing – and don’t know, so far.

When were they found?

The legs were found by fishermen on the riverbank near the Hepburn Street dam in May. Nothing else related was found in the area, the coroner said.

Authorities believe the person was killed up to six months earlier.

Lycoming County Coroner Chuck Kiessling rubs the bridge of his nose as he takes a phone call on his smart watch, in his office in Williamsport, Pennsylvania. (File photo/2018)

What do they look like?

The legs were cleanly cut near the knees by what’s believed to have been a thin-blade, hand-held saw. The feet have pink-painted toenails, Lycoming County Coroner Charles E. Kiessling Jr. said. The person’s ethnicity isn’t known.

The legs had on Ralph Lauren socks, white with red, white and blue flags on them.

Lycoming County Coroner Charles E. Kiessling Jr. said the legs had on Ralph Lauren socks, white with red, white and blue flags on them.

Who do they belong to?

State police have opened a missing-persons case in a federal database. DNA from the legs are included, but no identity has been uncovered yet.

No one in Williamsport had been reported missing, police said.

A forensic anthropologist at Mercyhurst University in Erie is studying the remains and will provide a report, Kiessling said.

It isn’t his case, but veteran Dauphin County Coroner Graham Hetrick says DNA likely will be the key tool in identifying the victim.

The killer or killers might have made a major error by tossing those limbs in the river, Hetrick said. The cold water, he said, would have preserved more evidence for investigators to go on.

Donald Ruby, pictured during his 1987 trial, was first convicted and sentenced to life in prison in the infamous Torso Murder Case. He was retried and acquitted in 1993.

Flashback

In May 1984, a fisherman found a cardboard box along the Juniata River in Perry County. Inside was a human torso, identified months later as a 31-year-old woman. Donald Ruby, an acquaintance, was convicted in the so-called “Torso Murder Case," but later had his conviction overturned.

PennLive’s John Beauge and Matt Miller provided the information for this report.