PORTLAND, Maine — A Wisconsin man has pleaded guilty in federal court in Portland to one of two charges of transporting child pornography depicting children as young as 1 year old being sexually assaulted.

Ryan Jeremiah Abbott, 22, pleaded guilty April 8 to one count while the federal government dismissed the second count, according to documents filed in U.S. District Court.

Abbott was arrested by U.S. marshals in Wisconsin on Dec. 23, 2014, for the Class B felonies, which were allegedly committed in October and December 2014, according to a criminal complaint filed by Special Agent David C. Fife of the Homeland Security Investigations office in Portland.

Abbott allegedly received and forwarded to others, including an undercover officer, 145 videos of children as young as 1 year old being sexually assaulted.

A search warrant of Abbott’s email account allegedly revealed more than 3,400 emails involving the solicitation and exchange of child pornography.

Abbott’s case was transferred to U.S. District Court in Maine because the emails were received in Maine and the investigation was conducted in this state. He initially pleaded not guilty to both counts.

At a Feb. 18 detention hearing, Abbott was ordered held because the case involved alleged crimes of violence, and Magistrate Judge John H. Rich III determined there was a significant risk that Abbott would flee, according to court documents.

Abbott’s case was scheduled to go to trial in May. Assistant U.S. Attorney Craig M. Wolff wrote in an April 6 court filing that had the case gone to trial, witness testimony, electronic evidence and documentary evidence would prove Abbott’s guilt.

Judge Don D. Levy accepted Abbott’s guilty plea in U.S. District Court in Portland.

Under the terms of the agreement, Abbott will be sentenced to a minimum of five years and a maximum of 20 years in prison, a maximum fine of $250,000, and a term of supervised release of five years to life.