The Romanian government says it is investigating claims that horsemeat found in food products in several European countries came from Romania.
complicated
the sequence of processes involved in taking a product from where it is made to where it is sold
buildings where animals are killed for their meat
written records and documents
proved innocent
about, approximately
kills animals for meat
an official process to find out information about something that has happened (also spelled 'enquiry' in the UK)
believability, trustworthiness
possible future effects