OSP extend their thanks to people who have already come forward with information. At this time, OSP has exhausted all investigative leads on what the public had previously provided. Anyone with information regarding the identity of the suspects, that they have not already reported to law enforcement, please call the Oregon State Police Northern Command Center at (503) 375-3555 or email tips to firstname.lastname@example.org. All calls are kept confidential.
The investigation is ongoing and information will be released when available. The link below was provided by Oregon Parks and Recreation Department in their original release. It also contains links to the photos and video of the vandalism.