Short answers, pulled from the story.
Nicholas Carew was knighted sometime before 1517 and held multiple high offices including Master of the Horse. He also received a vacancy in the Order of the Garter in 1536 fulfilling a promise made to Francis I.
Cardinal Wolsey believed Nicholas Carew had too much influence over the young King Henry VIII. Wolsey managed to have Carew sent away from court replacing him with Richard Pace and later engineered his dismissal through the Eltham ordinances of 1526.
The King believed Nicholas Carew had been involved in the Exeter Conspiracy to depose him and place Cardinal Reginald Pole on the throne instead of Henry. Carew stood trial on the 14th of February 1539 and was found guilty of high treason before being beheaded on the 3rd of March 1539 at Tower Hill.
Queen Mary I granted the Coulsdon estate to Carew's son in her first year of reign. The estate was held in chief by the service of one-fortieth part of a knight's fee while Sir Francis Carew attained a reversal of his father's attainder but did not receive his estates.