Police said that a woman's body in unrecognisable state was found from a secluded place in Merta city of Nagaur district on On October 27.
Around the same time, it was reported that three women had gone missing the same day in Pushkar, Pali and Merta areas.
Nagaur Superintendent of Police Anil Paris Deshmukh said that based on prima facie evidence, they asked the parents of the three women to come with their Aadhaar cards.
"We used the thumb impression machine to authenticate her (the body's) fingerprint. In first attempt, the machine failed to authenticate. We washed the fingers and the machine could then authenticate her," he said.
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After her identification was confirmed, a few suspects were interrogated during which it was revealed that the woman was in a relationship with one Deepak Lal, an electrician, for the past two years, police said.
Deepak Lal had called her to meet him and took her to a secluded place, where he strangulated her and set the body on fire, police added.
The accused was arrested on Wednesday.
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