Final answer:
Edward II, the English king who reigned from 1307, is believed to have been murdered by his wife Isabella and her lover Roger Mortimer in 1327.
Step-by-step explanation:
The English king who ruled from 1307 (not 1302 as stated in the question) and is believed to have been murdered by his wife Isabella and her lover Roger Mortimer in 1327 was Edward II. Edward II's reign was marked by military defeats and domestic strife and eventually led to his forced abdication in 1327. The circumstances surrounding his death are controversial, but many historical accounts suggest that after his abdication, he was murdered at Berkeley Castle on the orders of Isabella and Mortimer, who had seized de facto control of the government.