Cops say they've still yet to find any signs of suspicious activity surrounding Hulk Hogan's death ... this despite his daughter, Brooke Hogan, saying Tuesday there are aspects of his passing she finds fishy.
The 37-year-old Hogan told Bubba the Love Sponge on his radio show she was skeptical about a few things that came out after the WWE legend died ... namely his leukemia diagnosis.
She wondered why, if he did indeed have it, how did doctors not discover it earlier?