CLARK COUNTY, Wash. -- When the First Congregational Church went up in flames you couldn't miss it. Fire ripped through the unique ark-like roof, in the early morning hours of May 22, 2016.

A day later, another fire before dawn at the Liberty Bible Church in nearby Salmon Creek. Investigators ruled both were arson.

And now they believe the arsonist is the man caught on video setting a fire a few days later at a Brush Prairie teen addiction recovery center called Daybreak.

Background: $10K reward offered in Hazel Dell church arson

Images from the video were released to the public Thursday. Investigators waited a long time to release the surveillance material, saying they had to first protect the case they were building.

But now they're asking the public to take a close look at the man in the photos, and the unique hat he left behind at the third fire. It's marked up with symbols of the comic book character Deadpool.

Hat investigators believe suspected arsonist left behind.

Investigators hope the public can help provide a break in the case.

“Maybe they have been thinking they have somebody in mind that may have been responsible for this but just didn't feel comfortable coming forward,” said Curtis Eavenson, Assistant Fire Marshall for Clark County. "Maybe this will spur it on and they'll say, 'OK, I know who that is.'"

First Congregational Church members still wonder who set their place of worship ablaze, and why.

"One of the reasons I wanted to come was to see where we are at," church leader Ken Rowe said. "But I think at this point it's secondary on people's minds to wanting to get the church rebuilt.”

There is a $20,000 reward for information leading to an arrest and conviction in the case. Anyone with information is asked to call the Clark County Sheriff's Office Tip Line at 1-877-CRIME11 (877) 274-6311 or ATF Fires Tip Line: 1-888-ATF-FIRE (1-888-274-6311)

Investigators vow to follow every lead.

“We will not give up on this case, we will find this person some day,” said Eavenson.