Question: Why did Edward Despenser (Died 1342)'s father die?

Knowledge 1: Edward Despenser (died 1342)
Edward le Despenser (died 1342) was a son of Hugh le Despenser the Younger by his wife Eleanor de Clare.His father, a favourite of Edward II of England, was executed in 1326.Through his mother, he was a great-grandson of EdwardI of England. [SEP] Knowledge 2: Hugh Despenser the younger
Hugh le Despenser, 1st Lord Despenser (c. 1286 – 24 November 1326), also referred to as "the younger Despenser", was the son and heir of Hugh le Despenser, Earl of Winchester (the elder Despenser) by his wife Isabella de Beauchamp, daughter of William de Beauchamp, 9th Earl of Warwick.He rose to national prominence as royal chamberlain and a favourite of Edward II of England.Despenser made many enemies across the nobility of England which, after the overthrow of Edward, eventually led to him being charged with high treason and ultimately hanged, drawn and quartered.
Knowledge 1: Hugh le Despenser, Baron le Despenser (1338)
Hugh le Despenser, 2nd Baron le Despenser( 1308 – 1349), Lord of Glamorgan, was the eldest son and heir of Hugh Despenser the Younger and grandson of Hugh le Despenser, 1st Earl of Winchester.His father and grandfather were both executed in 1326.His mother was Eleanor de Clare," suo jure" Lord of Glamorgan, daughter of Gilbert de Clare, 6th Earl of Hertford and Joan of Acre.Through his mother, Hugh was a great grandson of King Edward I.He married Elizabeth Montague( d.1359), and both are buried in Tewkesbury Abbey, Gloucestershire, which abbey was founded by Robert Fitzhamon( d.1107), the first Norman feudal baron of Gloucester and Lord of Glamorgan. [SEP] Knowledge 2: Philip le Despencer, 2nd Baron le Despencer
Philip le Despenser, 2nd Baron le Despenser( c.1365 in Nettlestead, Suffolk, England – 20 June 1424) was the son and heir of Philip le Despenser, 1st Baron le Despenser.Philip was aged 36 and more at the death of his father Philip Despencer in 1401, having been knighted in 1385.He married Elizabeth de Tibetot, co-heiress and daughter of Robert Tiptoft, 3rd Baron Tibetot and his wife Margaret Deincourt.By this marriage he inherited the manors of Nettlestead and Barrow among others.He was never summoned to Parliament, and died on 20 June 1424 without male heir.Any hereditary right created when his father was summoned passed with his property to his only daughter, Margery le Despencer, wife of John de Ros, 7th Baron de Ros and secondly Roger Wentworth of Nettlestead, Esq. Margery and Roger Wentworth of the later Lords Wentworth and of Jane Seymour, third queen consort of King Henry VIII.
Knowledge 1: Edward Despenser (died 1342)
Edward le Despenser (died 1342) was a son of Hugh le Despenser the Younger by his wife Eleanor de Clare.His father, a favourite of Edward II of England, was executed in 1326.Through his mother, he was a great-grandson of EdwardI of England. [SEP] Knowledge 2: Hugh le Despenser, Baron le Despenser (1338)
Hugh le Despenser, 2nd Baron le Despenser( 1308 – 1349), Lord of Glamorgan, was the eldest son and heir of Hugh Despenser the Younger and grandson of Hugh le Despenser, 1st Earl of Winchester.His father and grandfather were both executed in 1326.His mother was Eleanor de Clare," suo jure" Lord of Glamorgan, daughter of Gilbert de Clare, 6th Earl of Hertford and Joan of Acre.Through his mother, Hugh was a great grandson of King Edward I.He married Elizabeth Montague( d.1359), and both are buried in Tewkesbury Abbey, Gloucestershire, which abbey was founded by Robert Fitzhamon( d.1107), the first Norman feudal baron of Gloucester and Lord of Glamorgan.

Answer: hanged, drawn and quartered