TULSA, Oklahoma - A sexual assault suspect, arrested a week ago, is behind bars and facing more than a dozen charges. Prosecutors filed those charges Friday and charged him as a youthful offender.

Prosecutors said the reason he wasn't charged as an adult was because of his age. Dayquan Williams is only 16 and the charges are so serious for his age, by law he falls into this special youthful offender category.

Prosecutor Steve Kunzweiler, said, "For the longest time we had a sequence of offense and victims, where this was a stranger. It was only through the good efforts of the Tulsa Police Department, and their detectives, where we got to the point where we can identify a suspect."

With that evidence from police, prosecutors charged Williams with attempted 1st degree rape, three counts of forcible sodomy, three counts of sexual battery, two counts of kidnapping, two counts of assault and battery, two counts of first degree burglary, robbery with an imitation firearm and attempted robbery.

Tulsa Police connected Williams to an assault on a Union student on her walk to school last month, as well as three other attacks.

Detectives said he's responsible for attacks at a south Tulsa coffee shop and two area apartment complexes that date back to late last year.

Damon Williams, Dayquan's older brother, said his little brother dropped out of high school and was trying to get his life back on track.

"I just can't believe he would do it though, he's my brother. I've been living with him my whole life, and I've never seen him act like that with any female," Damon Williams said.

Prosecutors filed the charges against Williams as an adult but then re-filed them against him as a youthful offender.

Being charged as a youthful offender, Williams will face the same public courtroom an adult would, but the youthful offender designation requires the judge to consider his young age.

Williams' attorneys could argue the 16 year old should be tried as a juvenile.

Prosecutors intend to argue the crimes Williams is charged with are so serious, he should be treated like an adult if he's convicted.

"The only thing that's going to move him one way or the other off of that, (youthful offender status), will be presented to the judge. We're too early in the process to see where that's going to go," Kunzweiler said.

Prosecutors said the only way someone Williams' age could get charged as an adult is if he, or she, was charged with murder.

Williams is in the Tulsa County Jail with a $372,000 bond.