A Lee’s Summit man will spend five years in a federal prison for cyberstalking and possession of child pornography.

U.S. District Judge Gary A. Fenner sentenced August W. Jentsch, 25, of Lee’s Summit, to five years in prison without parole on Friday. Jentsch had pleaded guilty on Dec. 30 to one count of each as part of a plea agreement with federal prosecutors.

Jentsch admitted to stalking a teenage girl whom he had briefly dated. He stalked her from Jan. 2, 2008, through Aug. 29, 2011, after the two had dated in December 2007.

The stalking victim notified police at the University of Minnesota, where she was attending school, that Jentsch had hacked into her email account and obtained nude images of her that were taken when she was 16. The victim told police that their 20-day relationship in December 2007 had not been romantic and that the two did not have sex.

Jentsch began stalking the victim shortly after that relationship by showing up at her place of employment and residence and by texting and emailing her. He set up fictitious Facebook profiles of her on several occasions and posted nude photos and video of the victim from the images he obtained by breaking into her email account. Jentsch changed the passwords on the email account and sent random emails to her contacts with nude photos of her. He also set up another social media account to invite others to contact the victim through Facebook to engage in sexual activity.

After the victim put a restraining order on Jentsch on Oct. 13, 2011, police found images and video of the victim on an SD card in his computer during a search of his residence. They also discovered a video of child porn on his computer that involved a second 15-year-old victim engaged in sexual activity with Jentsch.