Can my boyfriends family take items legally without my consent?

Location: Washington

We’ve lived together on our own far away from his family for over 3 years Boyfriend has passed away Their family is now trying to seize items No proper documentation has been shown to me over estate owner/will in his name

All I wanted was a camera and some memories we paid for together, the camera was 10k that we went in on together. His mother decided to take the camera, along with the SD cards which has intimate memories and adventures we went on together

What can I legally do about this? Thanks

Author: ThrowRAwareJellyfish