A court on Tuesday sent Rajendra Kumar, principal secretary to Delhi Chief Minister Arvind Kejriwal, accused of misusing his official position and facilitating tenders worth Rs 9.5 crore, to five days CBI custody.Central Bureau of Investigation Special Judge Arvind Kumar allowed the agency to question Rajendra Kumar, former assistant director of VAT department Tarun Sharma, Endeavour Systems Pvt Ltd directors Sandeep Kumar and Dinesh Kumar Gupta and a fifth man, Ashok Kumar, till July 10.The CBI, which arrested the five on Monday, sought 10 days custody of the accused saying it had to probe the money trail and confront the accused with one another. The defence counsel opposed the plea.The CBI had on December 14, 2015 registered a FIR against Rajendra Kumar, a 1989 batch IAS officer, for allegedly abusing his official position in awarding contracts from the Delhi government to Endeavour Systems.