Singh speaking to reporters claimed that "slips used to reach Delhi Police chief quite often asking about posting some people as Station House Officers".
"These were not a few postings but in large number of police stations," he told the channels.
Meanwhile Congress General Secretary Digvijay Singh responded to Singh's comment and said that 'false charges against Home Minister Sushilkumar Shinde were condemnable.'
Singh said that the Delhi Police was stopped by Shinde from questioning a Mumbai-based businessman, who is said to have "some kind of links" with Dawood Ibrahim, in connection with the betting in Indian Premier League, a T-20 cricketing tournament.
RK Singh recently joined the BJP.
With PTI inputs