Ok there are a few potential CR possibilities here.
1. Derek works with Mako. He is a CSI at Recolle Crime labs 2. Derek works with and is childhood friends with Tatsuo who also works at the crime lab. 3. Derek is friends with Mako's girlfriend, Ann. 4. Derek was a theater kid on high school, so he likes his movies a lot, plus karaoke.
Re: Korra | The Legend of Korra
1. Derek works with Mako. He is a CSI at Recolle Crime labs
2. Derek works with and is childhood friends with Tatsuo who also works at the crime lab.
3. Derek is friends with Mako's girlfriend, Ann.
4. Derek was a theater kid on high school, so he likes his movies a lot, plus karaoke.
Let us try and make something work! :)