MUMBAI, Feb. 21 -- A hawala operator has been arrested in the Torres jewellery scam for helping the absconding Ukranian masterminds introduce unaccounted US dollars into the formal banking system in India. Mulund resident Lalan Singh, 58, was arrested by the Economic Offences Wing (EOW) of the Mumbai Police after he returned from the Maha Kumbh Mela in Prayagraj....