Some of the emails had the subject line, "Think Twice." They were sent from a spoofed email address. The sender claimed to have had an associate plant a small bomb in the recipient's building and said the only way to stop him from setting it off was by making an online payment of $20,000 in bitcoin.
The sender never received any money as everyone contacted either couldn't afford it or assumed it was a hoax. 
( z1 receive :polarity - :ARG0 ( z2 person :ARG0-of ( z3 send ) ) :ARG1 ( z4 money :mod ( z5 any ) ) :time ( z6 ever ) :ARG1-of ( z7 cause :ARG0 ( z8 or :op ( z9 possible :polarity - :ARG1 ( z10 afford :ARG0 ( z11 everyone :ARG1-of ( z12 contact :ARG0 z2 ) ) :ARG1 z4 ) ) :op ( z13 assume :ARG0 z11 :ARG1 ( z14 hoax :ARG1 z4 ) ) ) ) )