[IoCaster]

"I think somebody really screwed up by leaking the Tarot information, but it could benefit the investigation because I don't think the killer is finished yet."

I'm more inclined to think that any benefit would be along the lines of spotlighting this killer to any acquaintances who would know about an association with Tarot cards. Someone out there knows or suspects who this killer is. The information about the Tarot card may help convince someone to tip off the police. At least I hope there would be a bright side to this leak of info.

[Beenliedto]

The information about the Tarot card may help convince someone to tip off the police.

It has also effectively ended the speculation about terrorism.