YOUNGSTOWN, Ohio - A man who operated a photography business in Lisbon has changed his plea to guilty in federal court Tuesday on child pornography charges.

David Grunden, 35, appeared in U.S. District Court in Youngstown where he was scheduled to go on trial next month on charges of receiving, possessing, and advertising child pornography.

He'll be sentenced in July

21 News crews in the courtroom report that Grunden addressed the court, apologizing for his actions while pleading guilty to charges in the case. 

Investigators say Grunden received numerous images of minors engaged in sexually explicit conduct and had child pornography on his computer.

Grunden operated DCG Photography, which according to its website specialized in photography, graphics, and video production.

Grunden was indicted in federal court on charges of receipt of visual depictions of real minors engaged in sexually explicit conduct, and advertising child pornography. 

The arrest followed a nine-month investigation that included placing a surveillance camera to watch him outside his home.

The U.S. Attorney's Office said it believes Grunden tried to solicit and entice children, as well as solicited male adults to have sex with children on film.