What happened to Martinius Johnsen Næss?

Hi, I am attempting to locate a Martinius Johnsen Næss who is supposed to have emigrated from Alstahaug, Nordland to USA in 1886/7. This is what I know of him: This is his baptism record: https://media.digitalarkivet.no/view/6632/80 He lived with his parents in the 1865 and 1875 censuses: https://www.digitalarkivet.no/census/person/pf01038359003519 and https://www.digitalarkivet.no/census/person/pf01052414004024 He had two sons out of wedlock by Josefine Johansdatter: https://media.digitalarkivet.no/view/6632/34418/76 and https://media.digitalarkivet.no/view/51972/13. It is noted that when the youngest son was baptised, Martinus was in America. It is also noted that Martinus emigrated in his confirmation records: https://media.digitalarkivet.no/view/6633/34428/36 When his youngest son dies in 1888, Martinus is listed as next-of-kin, but I think this was just a listing of the child's father rather than as a sign that Martinus had returned from the states. I have not been able to located him in Norway after 1887. I tried to look for Martinus/Martin on ancestry.com and familysearch, but I get overwhelmed by all the Martins and Martinus Johnsen/son there are and I have not been able to see which one of these could be the Martinus I am looking for. Would greatly appreciate any assistance in finding out what happened to Martinus in America (if he stayed there)!