SAN ANTONIO -

A former Air Force training instructor accused of rape and aggravated sexual assault at Lackland Air Force base was arraigned Monday on sex charges.
Staff Sgt. Luis Walker faces a court martial on charges of rape, attempted aggravated sexual contact, six specifications of aggravated assault, 18 specifications of violating lawful order regarding unprofessional relationships with trainees, adultery and obstruction of justice.
Walker is accused of having an inappropriate relationship with 10 female students during basic training.
"We take every alleged incident such as this extremely seriously and investigate them thoroughly," said Brent Boller, a spokesman for Joint Base San Antonio.
There are so many alleged incidents with so many alleged victims that Walker's defense team asked to sever the charges. They said so much testimony in one trial might become a case of "quantity over quality" and prevent Walker from getting a fair trial.
"Just as in the civilian system, he is innocent until and unless proven guilty," Boller said.

Walker did not enter a plea in the hearing. Instead, the defense put in a request for a change of venue.
If Walker is found guilty, he could face life in prison and a dishonorable discharge.
Walker's court-martial is scheduled to begin April 30.