He was in prison for theft Dec. 8th 1908 - April 11th 1909 (Polisunderrättelser No. 34 1909, ArkivDigital). Also, according to Polisunderrättelser No. 92 1909, he was wanted for theft after stealing SEK 11 (!) from K. G. Karlsson in Hubbo parish on August 8th 1909. He was taken into custody on Jan. 4th 1910 (Polisunderrättelser No. 3 1910) aand released after 5 monnths in prison on July 8th 1910
The death notice in Norrköping St. Johannes F:3 p. 84 says that he died in Helgona parish, Nyköping, from accident (with a question mark).
Here's a photo that was used for the "wanted" notice in Polisunderrättelser:
https://sok.stadsarkivet.stockholm.se/Databas/stockholmspolisens-spaningsfotografier-1869-1920/Visa/edvin-konstantin-nilsson/17609?sidindex=675He was taken into custody on Jan. 4th 1910 (Polisunderrättelser No. 3 1910) and released after 5 months in prison on July 8th 1910. He served a third prison sentence for theft from Sept. 1910 to August 1911. (Polisunderrättelser No. 38 1911) and a fourth in 1918 (P U No. 53 1918).
In 1928 he is wanted for bicycle theft and in 1930 he served a 3 month prison sentence for theft.
So a long career as a petty criminal.