Seth Mull allegedly forced a woman to take drugs, burned her, choked her and forced her to become a sex slave.

But that was just the beginning.

After the crimes he is charged with at a Bethlehem hotel were publicized, more than a dozen additional victims came forward, according to Northampton County District Attorney John Morganelli.

Assistant District Attorney Laura Majewski said Colonial Regional police are investigating claims made by four victims. Mull is in Philadelphia now, where he's been charged with rape and assault, according to Bethlehem police Chief Mark DiLuzio.

The 30-year-old Lower Saucon Township man is linked to more sex trafficking crimes in Harrisburg, San Diego, Chicago and Honolulu, according to police. Police in Pittsburgh are looking into claims by about a dozen women, Bethlehem police said.

"He travels, and he leaves behind this carnage," DiLuzio said.

Majewski said police believe Mull is a Warren County, New Jersey, native.

Northampton County news conference on sexual assault case https://t.co/onGBj2D0Rn — Sarah Cassi (@SarahCassi) December 1, 2017

Morganelli wants anyone who has been abused by Mull or anyone who knows a victim to come forward with information.

"We do believe there are more young girls that have been traumatized, raped, sexually assaulted, strangled, threatened who may be in fear," he said. "Our concern is for their well being. Come work with us. We will get you through this process."

Majewski said the first victim who came forward to police met Mull at the Holiday Inn Express hotel on Cherry Lane in Bethlehem for a date. Once in the hotel room, she became his prisoner, she said.

Morganelli said Mull solicits victims on dating websites such as Plenty of Fish, Facebook, Tinder or Backpage. He presents himself as a "very compassionate, nice guy," but when the women want to leave, he intimidates them. He calls himself a personal trainer on his Facebook page, but police that's not true.

Most victims are in their 20s but their backgrounds vary, police said.

The first victim to come forward dialed 911 after a 24-hour stay in the hotel room. That resulted in rape, strangulation and related charges filed Oct. 28, 2017, against Mull.

Morganelli said Mull threatens the victims and their families in order to coerce the women into remaining sex slaves.

Police have seized computers and cell phones at Mull's home in the 1900 block of Waldheim Road that he used to access human trafficking websites, sex slave sites and dating sites.

Morganelli said Mull presents the victims with sex slave contracts and refers to them as his "property." He forces them to take cocaine and methamphetamine so they become addicted and rely on him for drugs.

"He forces them to take part in orgies and other acts which he films, and/or forces his victims into prostitution," Morganelli said.

Morganelli said it's time to rid society of predators such as Mull. The more cases they prosecute, the longer they'll be able to keep Mull behind bars, he said.

"If you've been victimized by this individual or know this individual, it's time to come forward. We will help you," DiLuzio said.

HOW TO HELP

If you have any information about sex trafficking cases involving Seth Mull call one of the following phone numbers

Bethlehem police Detective Brian Quinn, 610-997-7691 or 610-865-7187.

Bethlehem police Detective Brad Jones, 610-865-7146.

The Northampton County District Attorney crime tip line, 610-829-6645.

Rudy Miller may be reached at rmiller@lehighvalleylive.com. Follow him on Twitter @RudyMillerLV. Find Easton area news on Facebook.