http://www.usatoday.com/news/nation/2007-03-23-samaritan-accident_N.htm

The perjury you mention is another dramatic episode.
Some details here:The policeman taking charge of the case alleged that the statement record can not be found because the police station was under decoration (yes, decoration). Then he told he had shot Peng Yu’s record by his cellphone. But soon it was found the picture, of only Peng Yu’s, was actually taken by another phone belonged to Ms. Xu’s son, a policeman as well. It makes people reckon a conspiration between the police and Ms.Xu .

Refer to Song Gongming(宋公明）
当地电视台播放的情况：当记者奇怪地问为什么派出所坚称找不到事件当天的报案笔录，当事的派出所长说 “我至少找了6次还是没有找到，不过我拍了笔录纸的照片”并信誓旦旦说“我为了搞清事实才用手机拍了笔录的”。当被追问到谁的手机拍的，所长拿出手机说就是他的这部手机。于是精彩的一幕出现了，电视画面打出了那张照片的出处却是其它型号的手机所拍！这位所长先生对电脑了解太少，不知道任何一张数码照片都有它属性的档案。故敢于冒着作伪证和篡改证据是要负法律责任的风险。那么这张照片是谁拍的呢？为什么所长只有年青人的笔录照片而没有老太和陈先生的那份呢？原来这张照片竟是老太的儿子提供的，而老太的儿子也是个公安人员。