The trouble with DNA is that it breaks down post mortem. The more brokendown it is, the harder it is to sequence.

DNA的问题在于死后会分解。越分解就越难排序。

Prosecutors now say they consider it " probable" that his death was caused by a police projectile after a post mortem showed marks on his chest.

检察官现在表示，他们认为他的死亡很可是由警方的抛射物造成的，验尸结果显示他的胸部有痕迹。

They extracted cells, post mortem, from people, chimps and monkeys of many ages, and looked at which genes had been active in these cells when the owners were alive.

他们从不同年龄层的人类，黑猩猩子尸体上提取相关细胞，然后观察哪些基因在宿主存活时表现活跃。