Jammu police has arrested an accused involved in double murder case. H was identified as Deepak Singh alia Sonu, resident of Talab Tillo. Police said accused was known to the family and would help in domestic work for which he was paid. Police said apparently extorting money was the prime motive for the murder. Sanjay Kumar Chandel, a retired DIET Principal, and his wife Veena Devi were found dead under mysterious circumstances at their Manorama Lane, Talab Tillo residence around 5:30 pm on Sept 15.