The Minnehaha County Sheriff’s Office is asking for help to find a man wanted on child pornography charges.



Mark A. Ullrich is facing 25 counts of child pornography.



Authorities issued a warrant for his arrest on Wednesday after discovering he’d been using his neighbor’s internet to break the law.



All 25 of the child pornography charges stem from a 10-day period in February. But according to an affidavit, Ullrich admits to downloading thousands of images over the last 15 years. At one point, he told police he turned over videos and pictures to the FBI because he didn’t want to get caught with them.



In this latest case, investigators discovered Ullrich was using his neighbor’s wireless internet signal to download illegal videos and pictures. When they stopped by his house and asked to see his computer, he told them, “If you do that, I’m probably going to jail.” At that moment, court papers say his computer was in the process of downloading more than 600 files.



According to the warrant, the Sioux Falls man lives about four blocks from Garfield Elementary School. Ullrich is not on the state’s sex offender registry.



Nothing in the court papers suggests he was making pornography.



