They could use the laser altimeter on the Lunar Reconnaissance Orbiter to locate the retroreflector that was part of the probe. Any photos they could get of the crash site would be helpful.
Sorry for the late response. All data that can be collected by the orbiter would contribute. But if the impact was at a substantial velocity, there may not be alot to photograph or evaluate. (I saw one posting reporting 1 km/sec descent rate but that’s impossibly fast and must be a typo or a misreported value)