Agency sources have said that a digital device seized from the Delhi Excise Department has helped the CBI trace the alleged role of Deputy Chief Minister Manish Sisodia in the liquor policy case. Mr Sisodia was arrested by the CBI last night after an eight-hour interrogation session. He is to be produced in court this afternoon. The senior AAP leader has faced allegations of corruption in bringing the now-cancelled liquor sale policy in the national capital. The party has denied the allegations, alleging political vendetta by the BJP-led central government.