The Stranger Part II

Meursault's life was slightly changing even though he wasn't noticing it. Firstly, he "witnesses" an argument between Raymond and a lady, then he was offered a job opportunity abroad in Paris but a change of life didn't appeal to him, then Marie asks him if he would consider marrying her, even though for him marriage was not a serious matter. Meursault is a kind of a stranger in his own life since he discovers something new everyday, like when he dines at Celeste's and a girl, the little robot, sits next to him. He was so curious to know something more about her that he had to follow her when she left the restaurant, like it is described: "Having nothing better to do,[Meursault] followed her but for a short distance." But when she disappeared in the streets, he gave up. Raymond had invited Meursault and Marie to spend the Sunday at a friend's bungalow and they decided to go all together, but Raymond told Meursault that some Arabs were watching on him because of the incident that happened with the lady the other night. When they arrived at the seaside, they met Masson and his wife and they started chattering, they swam on the beach, they ate and then the three men decided to go for a walk; a walk that changed the whole direction of the day that was supposed to be great and pleasant. During their walk, they encountered the Arabs and they started a huge fight were Raymond was injured and stabbed on his arm an cut on his mouth. Even though the Arabs managed to run away, Raymond, being angry decided to go for a walk by himself, but Meursault followed him. As they were walking they met the two Arabs again, but this time Raymond gave the gun to Meursault, the gun that later on would take the life of a human being, take the life of one Arab by Meursault himself. Meursault blamed the sun, because the sun was so hot and he was starting to feel sweaty and strangely was reminded of his mother during the time he was confronting the Arab. Meursault killed the Arab, but the 4 gun shots that were a knock on the doors of unhappiness.
Moreover, I am curious to know that if the doors that will be opened for Meursault will be the doors towards a life punishment or escapement in the unknown, where nobody would know what really happened between him and the Arab.