A PCR call was received at 8 PM about a murder-cum- robbery case near Chhawla stand in Najafgarh area.
Both the victims were rushed to a nearby hospital where one of them, identified as fruit-seller Sanjay Kumar, was declared dead, while another person, businessman Ashok Kumar, was critical and undergoing treatment, police said.
Ashok told police told that he was leaving for home from his shop when two boys assaulted him and tried to snatch his bag containing Rs 80,000 in new notes.
The robbers fled with his scooty and cash bag. During investigation, the employees who had worked in the past at Ashok's shop were questioned. On the basis of technical surveillance and local inputs, Dhyan Singh was detained.
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He had been sacked by Ashok last year over his habit of stealing money from the shop. Thereafter, he wanted to settle score with him, said DCP (Southwest) Surender Kumar.
"Dhyan confessed to plotting the entire robbery, on his tip off, a trap was laid near Dichaon bus depot and other accused Padam, Divakar, Sachin and two juveniles were apprehended. Police have also recovered the victim's scooty and firearms used in robbery," he said.
Police have also recovered the robbed cash amounting to Rs 11,000 from the accused.
"It has been found that both the juveniles apprehended in this case, had also been apprehended in February 2016 in a case of attempt to murder and robbery when they hit a businessman in Nihal Vihar," he said.