51.   Authorities cracked the case after the sister of one of his rape victims called police.

52.   Doyle, an expert on the illegal export of weaponry and other strategic items, said he cracked the case through documents and a confidential source.

53.   In any case, the bodyguard appears not to have given police the key information they need to crack the case.

54.   It was the first detailed official report about how police cracked the case that sharpened public concerns about safety in China.

55.   Massive investigation cracked Lockerbie case.

56.   Nor did the paper say how police cracked the cases.

57.   Now biologists appear to have cracked the case, thanks to technology, diligence and a heaping measure of luck.

58.   Now biologists appear to have cracked the case.

59.   Police cracked this case nearly as quickly by analyzing telephone calls to the restaurant.

60.   Solomon credited exhaustive work by investigators in cracking the case, but would not disclose the breakthrough that led to the arrest.