Loud Engine Noise problems of the 2010 Lexus RX

Tl- the contact owns a 2010 Lexus Rx350. The contact stated that while driving at 65 mph, the oil pressure light illuminated. The contact pulled off to the side of the road and and checked the oil and there was no oil in the vehicle. The contact took the vehicle to an independent mechanic where it was discovered that the oil coolant line had burst; the vehicle was repaired and given back to the contact. Upon picking up the vehicle while traveling at 45 mph,the vehicle began to make an abnormal noise. And began to drive roughly. Once he made it home, the vehicle towed back to the independent mechanic. A diagnostic was performed and the vehicle was then diagnosed with engine failure. The dealer nor the manufacturer had been notified of the failure. The vehicle had not been repaired. The failure mileage was approximately 160,000. Jo.