US

Prosecutor's office: Arizona teen indicted in sexual predator case

This police booking photo provided by Pinal County Sheriff's Office shows Tyler Kost from Pinal County, Ariz.  Kost, 18, is accused of being a serial sex predator who allegedly targeted fellow high school students has been re-arrested.  Officials say sheriff's detectives arrested Kost on Thursday, May 1, 2014,  on new allegations that include additional cases reported after his initial arrest. Sheriff Paul Babeu says there are 18 reported victims so far and that other cases may remain unreported. Kost was released on $10,000 bond after being arrested Monday on suspicion of two counts each of sexual assault and sexual misconduct with a minor. (AP Photo/Pinal County Sheriff)

This police booking photo provided by Pinal County Sheriff's Office shows Tyler Kost from Pinal County, Ariz. Kost, 18, is accused of being a serial sex predator who allegedly targeted fellow high school students has been re-arrested. Officials say sheriff's detectives arrested Kost on Thursday, May 1, 2014, on new allegations that include additional cases reported after his initial arrest. Sheriff Paul Babeu says there are 18 reported victims so far and that other cases may remain unreported. Kost was released on $10,000 bond after being arrested Monday on suspicion of two counts each of sexual assault and sexual misconduct with a minor. (AP Photo/Pinal County Sheriff)  (The Associated Press)

An 18-year-old Arizona man accused of preying upon school students faces multiple counts of sexual assault, sexual conduct with a minor and other crimes.

Pinal County sheriff's deputies arrested Tyler Kost of San Tan Valley last week, accusing him of being a serial sex predator who assaulted nearly 20 students.

County Attorney Lando Voyles has scheduled a news conference Thursday on charges against Kost.

Kost was initially charged in criminal complaint last week, but Voyles spokesman Jim Knupp says Kost is now charged in a 27-count indictment issued Wednesday.

Knupp says the indictment's charges accuse Kost of sexual assault, sexual conduct with a minor and other crimes.

The previous complaint now replaced by the indictment contained similar allegations.

Kost's attorney, Christine Whalin, did not immediately respond to requests for comment.