The LM eventually crashed due to lunar gravity anomalies. Since Houston didn’t know exactly where it landed, it was not useful to calibrate seismic experiments on the surface.  EarthriseDamaged Ascent StageCasper

On re-entry Casper hit the atmosphere at an altitude of about 400,000 feet above the earth and at a velocity of nearly 25,000 miles per hour.  Parachute DeploymentSplashdownTiconderoga Ceremony