In an interview on Monday, Kamkwasi claimed the ACB acted in bad faith.
He said that he doubts if the ACB would successfully prosecute him without hearing him. Kamkwasi said it was a surprise that after the arrest, the ACB lawyer asked for a date of court hearing before getting his side.
ACB arrested Kamkwasi last week on allegations that he defrauded a client of compensation money in circumstances where corruption was suspected.
But ACB director Alex Nampota on Tuesday said Kamkwasiâ€™s arrest was in conformity with the law.
Said Nampota: â€œThe arrest of Mr. Kamkwasi was in accordance with Section 15 of the Corrupt Practices Act (CPA). The section empowers us [ACB] to arrest any person in respect of whom we reasonably suspect an offence under the CPA or any written law has been committed.
â€œWe are not always duty-bound to hear the other side of the story before the arrest. However, having arrested,Â we do accord a right of audience under a warn and caution as is required by the Malawi Constitution.â€
But Kamkwasi described as â€œprimitiveâ€, the law that mandates ACB to arrest and charge a person without hearing their side. The lawyer said he would challenge the legality of his arrest by the ACB.