A convicted sex offender faces a hearing next week on charges he failed to notify state police he had online social networking accounts.

Corey C. Sager, 27, of Butler allegedly used Facebook and e-mail accounts for more than a year without registering them, according to court documents.

Troopers on Friday arrested Sager on felony and misdemeanor charges of violating state sex offender registration laws. He remains in the Butler County Prison on $150,000 bail.

Police began investigating the case in January after the National Center for Missing and Exploiting Children relayed a cyber tip it got about Sager’s Internet activities.

Investigators learned that Sager had a profile on the online dating site, myyearbook.com, and was using it to exchange e-mails with a 14-year-old girl, documents said.

The investigation also found that Sager for most of 2012 and for this year maintained a Facebook account under a fictitious name, documents said.

Under the state’s Megan’s Law, registered sex offenders must notify police when they move, change employment or enroll in school. Additionally, an offender’s e-mail accounts, social networking accounts and Internet service providers also must be reported.

Sager in 2008 was ordered to register as a Megan’s Law offender after pleading guilty in Butler County Court to charges that he engaged in sexually explicit online and cell phone text message conversations with an underage girl.

He also was sentenced to 2 to 6 months in the county prison.

A preliminary hearing for Sager on the latest charges is at 10:45 a.m. Monday at District Judge Pete Shaffer’s office in Butler.