A 35-year-old man from Rajasthan was arrested on Tuesday for allegedly posing as a police officer and trying to extort Rs 10 lakh from Indore BJP MLA Akash Vijayvargiya. Suresh Ghanchi, the accused, is suspected to be involved in similar crimes in other states too, the police said. On the Truecaller app, the number showed as being registered under the name "SP Indore".