no way to answer we don’t know all the facts
no. 1 a priest cant just “leave to get married” he has to discern his vocation with his spiritual director, bishop and/or head of his order first, without reference to romantic entanglements, and bases his decision on whether to stay or leave on the state of his vocation.
he can’t just walk off the job, there is a definite canonical procedure that must be followed.
If he is returned to the lay state, after due discernment and following the proper procedure, he would be free to marry (in accord with canon law on marriage of course). He may not, however, engage in any public ministry–may not preach, teach RE, lead bible studies, be EMHC etc. Period. Most of the laicized priests we see who have then married have done things licitly up to that point, but this last prohibition is broken very often, sadly.
a priest who simply leaves his duties, makes a civil marriage and holds himself out as a married man has much graver penalties than a simple layperson who contracts an invalid marriage, and (correct me somebody if I am wrong, not at work with references at hand) is specifically excommunicated and the penalty may be lifted only by the Pope.
since we don’t know if the gentleman in question has followed the proper procedure, we assume in Christian charity that he has, and do not allow it to disturb us, focusing instead upon our own spiritual condition.
Celibacy is a charism, a gift given to those who have also been given the vocation for which celibacy is a condition. It is a charism that comes with ordination. Like all gifts it can be accepted and developed, or rejected. Just as the sacrament of marriage brings its own charisms, fidelity and openness to life, for those who genuinely desire them, ordination as a sacrament brings the necessary charisms with it to carry out the duties of that state. It is a gift, not a job qualification.