CASTLE ROCK - A Douglas County High School teacher has been arrested on suspicion of sexual exploitation of a child and contributing to the delinquency of a minor.

Timothy Martini, 26, was booked into the Douglas County Jail after an investigation that began this month. He'sis being held on a $50,000 bond.

Details in the case have been sealed.

Martini is an agriculture and natural resources teacher at Douglas County High School. He's also an advisor for Future Farmers of America.

School officials say Martini has been placed on administrative leave.

Douglas County investigators are asking anyone with information related to this case, to contact Detective Dea Aragon at 303-814-7131.

Martini's arrest came within days of a Douglas County sheriff's deputy's arrest following an investigation into inappropriate text messages involving a juvenile. Robert M. French has since been fired from the sheriff's department. Like Martini, he faces possible charges of sexual exploitation of a child. Details in his case also haven't been disclosed.

The following letter was sent to Douglas County parents from Douglas County HS Principal Anthony Kappas:

Dear Douglas County High School Parents,

Student safety is our top concern here at Douglas County High School. For that reason, I want to let you know about an investigation regarding one of our teachers, Timothy Martini.

We have learned that Mr. Martini has been arrested by the Douglas County Sheriff's Office on suspicion of Sexual Exploitation of a Child.

I can assure you that Douglas County High School and the Douglas County School District take this matter extremely seriously and we are cooperating fully with the sheriff's office.

After learning of the investigation, DCSD immediately placed Mr. Martini on administrative leave. Because this is an ongoing criminal investigation, we are unable to provide further information regarding the case at this time.

Please do not hesitate to contact me with any concerns or questions. If you have further information about the investigation, contact the Douglas County Sheriff's Office.