UPDATE 9/14/12 @ 2:30 p.m.
CHARLESTON, W.Va. (WSAZ) -- The case against a teenager accused of fondling a 13-year-old girl on a school bus in Kanawha County is moving forward.

Matthew Cavalier waived his preliminary hearing Friday afternoon.

Cavalier and a 16-year-old boy are facing charges of first-degree sexual abuse.

Kanawha County Sheriff's Deputies say they molested the girl while on the ride home.

The 16-year-old is in a juvenile detention center.

His bond was set, if he is able to post it, he will be on home confinement and will not be allowed to have contact with anybody under the age of 18.

According to a release from the Kanawha County Sheriff's Department, Matthew Cavalier, 18, of Quick, W.Va., a 16-year-old male and a 12-year-old male are all facing charges.

Cavalier is being charged with two counts of sexual abuse in the first degree. He is being held in the South Central Regional Jail. The two juveniles are also facing two counts of sexual abuse in the first degree. They are both being held in the Tiger Morton Juvenile Detention Center.

According to the release, Cavalier and the 16-year-old forcible fondled various private areas of a 13-year-old girl. Also on the bus, the 12-year-old boy exposed himself to another 12-year-old boy and tried to force him to perform sexual acts.

The Kanawha County Sheriff's Department was called to Elk Middle and Herbert Hoover High School to investigate the alleged incidents which happened on Aug. 28 and Aug. 29.

No word what punishment to boys will face at school.

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There are allegations a girl was groped by several male students on the way to school.

We're told officials with the Kanawha County Sheriff's Department, the Kanawha County School Board, and the school district are looking into surveillance video on the bus.

Officials say the four suspects are accused of groping an 8th-grade girl.

"If found guilty, those students should be expelled," said Pete Thaw with the Kanawha County School Board "'What could be worse? It encompasses all the things we fight. We fight bullying. They molested an 8th-grade student? Come on. These guys must be outta their minds, and they certainly shouldn't be around decent children. They ought to be expelled."

WSAZ.com contacted the administration at Elkview Middle School to see if the bus situation was addressed to the student body or if letters were sent home to parents who have children who ride the bus.

The administration said it would have no comment.