Investigation Checkpoint #1 - The Cthulhu Murders

#1: Who is on the top of the suspect list according to the evidence so far?

By ONLY looking at the evidence so far, Halpin Chalmers is currently the top suspect.

 

#2: What evidence makes ___________ the top suspect currently?

First and foremost, Halpin was not invited to Sonia Green's party, avoided security, and snuck into the premise. His motives for doing this are currently unknown, however we know a few things. 

Second, according to Sonia's text message log, Halpin was very angry with Sonia over selling her company LOVE POTIONS PUBLISHING over to Darcy Lane. He was also very distressed in one message when he found out that Sonia was having this party to celebrate the close of the deal. 

And finally, if we look at the Security Check-In & Out, Sonia checked in and out of the library from the times of 9:12 to 9:17pm, and was found dead 7 minutes later. We believe that she was poisoned from something she drank, assuming it's from the bottle that was next to her body. Well, at 9:17pm, we also see Halpin having to check in with security, and his name written on the sheet. 

Halpin must have snuck into the library, talked with Sonia, shared a drink with poison in it, and then let her go to her death!