A second American has been named in a growing big game poaching investigation in Zimbabwe.

Pennsylvania Dr. Jan Casimir Seski, 68, is accused of killing a lion in an illegal hunt in April and his guides have been arrested in the African Country.

Dr. Seski has been pictured online with a series of dead animals including elephants, hippos, zebras, ostriches, impala and water buffalo. An online hunting club claims he has killed six elephants.

It comes a week after Africa's most famous lion Cecil was killed by Minnesota Dentist Dr. Walter Palmer in early July, sparking international outrage.

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Hunter and prey: Dr. Seski poses here with a hippo he killed 'with one shot.' Hippos are quickly dwindling because of hunters who kill them for sport

Pennsylvania Dr. Jan Seski (pictured) is accused of killing a lion in an illegal hunt in April and his guides have been arrested in the African Country. He poses here with a hippo he killed with his arrow

Showing his true stripes: Dr. Seski poses with a Zebra he killed on a website for a company called Horn's African Safari's. Seski is accused of illegally killing a lion back in April

Racing chicken: 'First trophy of the hunt, a 'racing chicken,'' says the caption along with this photo of Seski and a dead Ostrich

Dr. Jan Seski is listed as being Director of Gynecologic Oncology at Allegheny General Hospital in Pittsburgh Pennsylvania

Dailymail.com called Dr. Seski who answered the phone and said 'just a minute,' before putting the reporter on hold and later hanging up the call. Future calls to his number went directly to voicemail.

Seski was involved in an illegal hunt of a lion in April around Zimbabwe's Hwange National Park, said the National Parks and Wildlife Management Authority in a statement released to CBS.

A Zimbabwean landowner named Headman Sibanda was arrested in the case and is assisting police with their investigation, the authority said. He named Seski as being involved in the hunt.

Dr. Seski is listed as being Director of Gynecologic Oncology at Allegheny General Hospital in Pittsburgh Pennsylvania.

A handful of Seski's neighbors said he mostly keeps to himself and that he'd been buying up the land around his property. Ernest Hahn said Seski put up no-trespassing signs, breaking the rural area's tradition of people feeling free to cross property lines to hunt.

Killed at least six: Dr. Jan Seski poses with an elephant he's killed. According to the description on the Alaska Bow Hunting Website that posted the images, this is the sixth African elephant shot by Dr. Seski

Another kill: Seski's arrow struck high in the crease, traveled between ribs on the near side, cut completely through the top of the heart, then kept going out the other side, once again, between ribs, says the hunting website that also makes mention of the endangered animal's valuable tusk

Hahn said Seski can be 'quirky,' walking around wearing a low-slung pistol 'like a gunslinger,' for example, but he appreciates that his neighbor is protecting land from development.

'It seemed to me everything he does is aboveboard,' Hahn said. 'I've never seen him done anything illegal or unsportsmanlike at all.'

Not only is Dr. Seski an alleged lion killer, he is a member of the Alaska Bow Hunting Society that shows members posing with elephants, hippos, and other animals they've killed. Seski is a bow hunter which means he hunts animals with a bow and arrow instead of a rifle.

Dr. Jan Seski is decked out in camouflage as he pauses for a snap with this recently slain Caracal

Dr. Jan Seski poses here with what appears to be a tiny deer he killed on a hunt in Africa where he is accused of illegally poaching a lion

Here Dr. Seski poses with another elephant he's killed. According to the website this animal had a 45 pound ivory tusk. Elephants are quickly vanishing due to over hunting

The website shows an arrow piercing the skin of the African bull elephant Seski claims to have killed. His hunting club's website posts image after image of the animals he and other hunters have killed

'This Zimbabwe elephant is the sixth African elephant shot by Dr. Jan Seski. For this hunt Jan used our custom-built GrizzlyStick Momentum UFOC 175 arrows cut to 29 inches and fletched with 4-inch DuraVanes to accommodate his finger-shooting style,' says the website description under a photo of one of the elephants.

'The arrow was shot quartering into the elephant, penetrated a rib and one lung, lacerated the heart and liver, and was recovered in the gut. The elephant went a short distance and died. With results like this, no wonder Jan is a firm supporter of our Ultra-Magnum Arrow System,' said the site of the way the elephant was killed.

Poachers are the single biggest threat to elephants' survival. After decades of decimation of elephant populations for their ivory tusks, the international trade in 'white gold' was banned in 1989.

According to the International Union for Conservation of Nature elephants are listed as 'vulnerable' which is the category immediately below endangered.

In 1930, there were between 5 and 10 million African elephants. By 1979, there were 1.3 million.

Now there are around 500,000 left in the wild.

Dr. Seski holds a bundle of arrows, his weapon of choice in killing this African water buffalo

In one photo of Seski with another dead elephant on the Alaska Bow Hunting website, the description beneath the photo makes mention of the extremely valuable tusk.

'Really nice bull elephant taken by Dr. Jan Seski with one Ashby tipped arrow. The bull was quarteing away at 20-yards. The arrow struck high in the crease, traveled between ribs on the near side, cut completely through the top of the heart, then kept going out the other side, once again, between ribs. The ivroy was 50+# per tusk. Congratulations to Dr. Jan Seski on another fine elephant with the bow and arrow,' says the website.

Seski is pictured with a third dead elephant on the website who is described as having 45-pound ivory. Elephant hunting is legal in Africa though lion killing is not.

Home: A gate blocks the driveway where an outbuilding is visible on the property of Dr. Jan Seski in Murrysville, Pennsylvania on Sunday

Dr. Seski grabs a small animal from underneath a vehicle. 'A very rare sight indeed......luckily we got it pretty quick!!' says the caption along with the image posted to the Facebook page of Melorani Safaris

Dr. Seski crouches behind this Gemsbok he killed as part of his controversial hobby

'Dr. Jan Seski took this elephant bull with 45 pound ivory with one Ashby tipped arrow. He booked his hunt through Neil Summers of Bowhunting Safari Consultants. Look at the penetration Dr. Seski got with the Ashby broadhead even after going through the elephant's rib! Congratulations Dr. Seski!!,' says the description below the series of gruesome images.

Seski is photographed with a hippo he's killed, another animal that's disappearing due to hunting.

'Take a look at the penetration Jan Seski got on this hippo with a GrizzlyStik Ashby broadhead. Jan used an 85# Mathews Monster with a heavy arrow that drove the Ashby broadhead into the far rib. Congratulations to Jan on a fine hippo taken with one shot,' says the description beneath the photograph.

Suspension: Bow and arrow hunts were suspended this week and can only be approved by the head of the wildlife authority. Seski, a bow hunter, is pictured here with another Gemsbok he shot in Africa

Dr. Seski poses with one of the scores of animals he appears to have killed with his bow and arrow

Trophy hunter: Dr. Seski is seen with a Kudu bull he also killed in the African region in recent years

In addition to hippos he can be seen posing with dead water buffalo which have been on the endangered species list since 1986.



On another website called Horn's African Safari's, Seski can be seen posing with a zebra he killed along with a series of other animals.

A Facebook page for a company called Melorani Safaris shows Dr. Seski with a variety of different antelope he struck along with an ostrich he pierced.