Chhote Lal, who runs a tea shop, had admitted his wife Anju, who was 35, to Hedgewar Hospital two-three days ago after she complained of high fever.
She died in the hospital yesterday, and it was suspected to be a case of "chikungunya", police said today.
When the grieving husband took her body to his rented home in Karkardooma, his landlord allegedly didn't allow him to keep it there.
However, Babloo, Lal's landlord told police he helped him with money so that he could get an "AC ambulance to keep the body".
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He said Chhote Lal stays on the third floor of the house in a single room and the body would have started decaying had it been kept in the cramped space with no ventilation.
He told police that he had given Rs 2,000 to Chhote Lal and got an AC ambulance arranged for him to preserve the body for the night before cremation.
"With no option left, Chhote Lal then kept roaming with the body of his wife in the ambulance for close to four hours before he was spotted around midnight by the police beat staff near the Cross River Mall who came to know about his plight.
"When he revealed that he wasn't allowed to keep his wife's body at his rented accommodation, the staff called up one Bhanwar Singh, a businessman residing in the area around 12.30 am," said a senior police officer.