LUCKNOW, June 2 -- A second-hand motorcycle fitted with a fake number plate, hired shooters allegedly brought in to execute the killing, and a carefully crafted alibi involving trips out of Lucknow on the day of the murder were among the key elements of a conspiracy that led to the killing of property dealer Sandeep Singh, according to the Uttar Pradesh Special Task Force (STF) and Lucknow police.

The STF, in a joint operation with PGI police, arrested two persons, including the alleged mastermind, on Sunday and claimed to have cracked the sensational murder case that took place on May 27. However, the two alleged hired shooters remain absconding.

Investigators on Monday also seized four vehicles allegedly linked to the conspiracy, incl...