India, June 2 -- A couple has been arrested in Uttar Pradesh's Fatehpur for allegedly murdering and dismembering a 20-year-old man after investigators found a digital trail on their smartphones, including YouTube queries on how to evade capital punishment, dispose of a body, survive a police encounter, and prison amenities, police said on Tuesday.

Kiran Devi and her husband, Kamta Nishad, were picked up for questioning based on the former's high call volume with Vijay Nishad, who went missing on May 8. Inconsistencies in their accounts prompted a forensic examination of their mobile phones, which showed the incriminating search history.

Police superintendent Abhimanyu Manglik said Vijay Nishad had an affair with Kiran Devi, who allegedl...