Interesting times.
This from Wikipedia (Raleigh was originally imprisoned in the Tower since 1603 for his part in a plot against James):
In 1617, Raleigh was pardoned by the King and granted permission to conduct a second expedition to Venezuela in search of El Dorado. During the expedition, a detachment of Raleigh's men under the command of his long-time friend Lawrence Kemys attacked the Spanish outpost of Santo Tomé de Guayana on the Orinoco river, in violation of peace treaties with Spain and against Raleigh's orders. A condition of Raleigh's pardon was avoidance of any hostility against Spanish colonies or shipping. In the initial attack on the settlement, Raleigh's son, Walter, was fatally shot. Kemys informed Raleigh of his son's death and begged for forgiveness, but did not receive it, and at once committed suicide. On Raleigh's return to England, an outraged Count Gondomar, the Spanish ambassador, demanded that Raleigh's death sentence be reinstated by King James, who had little choice but to do so. Raleigh was brought to London from Plymouth by Sir Lewis Stukley, where he passed up numerous opportunities to make an effective escape.[55][56]
It goes on to say that after his execution, his embalmed head was presented to his wife - perhaps so she could bury it?