Your neighbor is any particular person you encounter, including your enemies and criminals.
> 27. Coming down to practical and particularly urgent consequences, this council lays stress on reverence for man; everyone must consider his every neighbor without exception as another self, taking into account first of all His life and the means necessary to living it with dignity, so as not to imitate the rich man who had no concern for the poor man Lazarus.
> In our times a special obligation binds us to make ourselves the neighbor of every person without exception and of actively helping him when he comes across our path, whether he be an old person abandoned by all, a foreign laborer unjustly looked down upon, a refugee, a child born of an unlawful union and wrongly suffering for a sin he did not commit, or a hungry person who disturbs our conscience by recalling the voice of the Lord, "As long as you did it for one of these the least of my brethren, you did it for me" (Matt. 25:40)
> [...] The teaching of Christ even requires that we forgive injuries,and extends the law of love to include every enemy, according to the command of the New Law: "You have heard that it was said: Thou shalt love thy neighbor and hate thy enemy. But I say to you: love your enemies, do good to those who hate you, and pray for those who persecute and calumniate you" (Matt. 5:43-44).
https://www.vatican.va/archive/hist_councils/ii_vatican_council/documents/vat-ii_const_19651207_gaudium-et-spes_en.html