NEWBERG, Ore. -- An 18-year-old man was arrested last Tuesday for sexual assault and for giving illegal tattoos to at least 10 people in his Newberg apartment, police said.

The nurse at Newberg High School told police on September 26 she had heard about a male student giving other students tattoos in his home, according to Capt. Jeff Kosmicki of the Newberg-Dundee Police Department.

Detectives learned the man had also been having sexual relations with underage students, Kosmicki said. Two 15-year-old girls confirmed those reports and Stephen Matt Lister was arrested.

Police learned Lister had performed tattoos on at least 10 people inside his apartment, in the 2700 block of Haworth Avenue, Kosmicki said. Lister's cell phone also contained 20 more pictures of what appeared to be of homemade tattoos.

Investigators said they think that Lister was re-using ink, which creates even more of a health risk. So far, one student has developed an infection.

The Newberg-Dundee Police Department is concerned that appropriate sanitation practices were not used, which can lead to serious infections or spread disease, Kosmicki said. During the investigation, we ve learned Mr. Lister was re-using the ink which is one of the things you certainly don t want to do, which can cause really serious infections with the transfer of blood borne pathogens.

Lister was charged with eight sex abuse charges and 10 counts of performing services in a field of practice without a license. His bail was set at $150,000.

Anyone who received a tattoo from him was asked to call police at (503) 538-8321.

(KGWreporter Jacqueline Sit also contributed to this report.)

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