How did the lights go off?

Newspaper is important

Who knew about the diamond's new valuation?

The police report mentions the height of the killer.

What is the diamond's last RIFD location?

Who could reach there on that time?

Lalit's conversation eliminates someone.

Evaluate each suspect wrt. motives to kill and motives to rob the diamond.

Read the police report very carefully.

Did the act of stabbing cause blood splattering?