murder I need one great Detective Conan's episode. Please Help

[saraha]

Hello, I want to make a mystery murder party in the country side, but i need a good story, with backstories of each character.

i was thinking of making a case of a murder, of a rich old man. With these suspects: wife, mistress, journalist, butler and a coworker.

The rich man is killed in his birthday. 

Please help me find a good episode of Detective Conan, i could use or even mix various episodes.

Thank you for giving me part of your precious time!