I’ve seen no evidence of a cover up by the Las Vegas PD.
Considering the lack of verifiable info coming out of them, the constantly changing narrative. There’s no way to reach any conclusion either way.
Then you haven't been paying close enough attention...
LVPD is covering up the slowness of their response to the shooting...first by falsely claiming the security guard called it in after being shot at the end of the shooting spree, then by claiming MB staff didn't notify them in a timely fashion once it became known the security guard was shot 5-10 minutes before the shooter opened fire on the crowd.