His Dad could of left to be a Men in Black or could of died. The out come could of been either or. But either way he would of lost his Dad. It really a sad moment.
Honestly I think he would of turned the job down to be with his son.
It's the MIB3 this is the part after they save the day and the bad guy kills J's Dad. K finds out young J was hiding in the car on the beach. He was waiting for his Dad so they could watch the launch of Apollo 11
To laugh, you must be able to cry. To find humour, you must find sadness.
Honestly I think he would of turned the job down to be with his son.