RL has hair that's plenty long enough enough to stick out of all sides of a baseball cap. She has a pear-shaped body. She is not tall and lean. She wears flowy tops, bright colors, and capri pants, not even remotely clothed like BL ever was. She would have to be draped from top to bottom in baggy clothes to look anything like her son.
It would be more likely that they might mistake CL for BL, not RL. Those cops have some explaining to do. Their story does not make sense. I think they also need to explain why they maybe left Gabby's water bottle behind in the park, and opened it up to the public so soon after finding a few pieces of BL there, not actually finishing the job of looking for things that may have belonged to them.
JMO