Buddha Stolen from Museum in 1961 Surfaces on London Market

Nadeem Badshah, 'Stolen Buddha statue to return to India after being found in UK'  The Guardian  Wed 15 Aug 2018  

A 12th-century statue of Buddha stolen from India nearly 60 years ago is to be returned to the country after it was discovered at a trade fair in the UK. The bronze sculpture was one of 14 statues ransacked from the Archaeological Museum in Nalanda, eastern India, in 1961. It is believed it changed hands several times over the years before eventually being sent to a London antiques dealer for sale. [...]  The statue was identified at a trade fair in March by members of the (ARCA), an organisation working to preserve cultural heritage, and which aims to recover stolen artefacts.  Police said the current owner and dealer were unaware of the statue’s history and agreed for it to be returned to India. 

If the owner was 'unaware of the history', why did they buy it in the first place? In such a case the word owner is a false label, they are nothing more than a careless handler of stolen property. Neither that person, nor the dealer who was helping to get this unpapered stolen object off their hands is named. Why not?