Christopher Reeves, 23, is being held at the Buffalo County Jail.
Kearney police say the assaults took place from July of 2013 through April of this year. Reeves allegedly had sex with three different girls between the ages of 12 and 16.
Court records were sealed for two of the three incidents. In an affidavit for an incident that happened in late December, a 14-year-old girl says she had sex with Reeves on two separate occasions that month.
The investigation led the police to incidents that allegedly happened in July of last year and April of this year. Victims did not come to police in those situations.
Court documents show Reeves did talk to the 14-year-old on Facebook.