Gina Damron and Mick McCabe

Detroit Free Press Staff Writers

Campbell served time in jail for an assault on a school security officer earlier this year.

Campbell is housed in the youthful offender unit with other 17-year-old males.

Jayru Campbell -- the Detroit Cass Tech star quarterback accused of assaulting his girlfriend last week and arraigned on a probation violation this morning for an earlier assault case -- now is being investigated in connection with an alleged assault in the Wayne County Jail.

According to sources familiar with the incident, Campbell and other inmates at the jail allegedly assaulted a fellow inmate.

Wayne County Sheriff's Office spokesman Dennis Niemiec said: "I can confirm that an allegation of an assault in the Wayne County Jail is being investigated."

Because he is 17, Campbell is housed in the youthful offender unit with other 17-year-old males, according to the sheriff's office.

Maria Miller, a spokeswoman for the Wayne County Prosecutor's Office, said the office received a warrant request from the sheriff's office on Thursday related to an incident that allegedly occurred in the jail on Aug. 31. She said "it was returned because it needed further investigation."

Campbell was released from the jail Friday, Niemiec previously said.

Campbell, who was sentenced in May, began serving his jail sentence in July for an assault on a Cass Tech security officer in January.

Campbell, who was also given probation, was arraigned this morning by Wayne County Circuit Court Judge Timothy Kenny on a probation violation. Kenny entered a not guilty plea on Campbell's behalf and remanded him to the jail.

Attorney Walter Pookrum, who represented Campbell today, declined to comment after the hearing.

After being released from jail Friday, Campbell was allegedly involved in another assault.

According to the prosecutor's office, it's alleged that Campbell was at Cass Tech on Friday "when he assaulted his girlfriend in front of other students over a dispute over a phone. Campbell was intercepted and placed in custody at the scene."

In connection with that case, Campbell is charged with unarmed robbery, assault with intent to do great bodily harm and misdemeanor domestic violence assault and battery, according to the prosecutor's office.

Campbell is scheduled to be back in court Sept. 25 for a preliminary examination in that case.​