I've watch this anime series couple of years ago. This is about an investigation/capturing the "popular" criminal KIRA who kills "criminals" by writing their FULL name of his DEATH NOTE.

"L", the famous, wisest investigator assigned to this case because the policeman can no longer solve the case by themselves. Can L capture the real KIRA? Will KIRA be captured easily? 

Know how the story end by watching death note at animefreak.tv.