Ugandan Speaker Oulanyah buried, father insists he was poisoned

What you need to know:

Oulanyah died on March 20 at Medical Centre in Seattle, US, where he had been rushed for specialised treatment for cancer.
Health Minister Jane Ruth Aceng said Oulanyah’s death was due to failure of his liver, kidney and heart resulting from cancer, and bacterial and viral infections.
But, speaking to mourners, Oulanyah’s father Nathan Okori repeated his earlier assertions that his son had been poisoned.