A 64-year-old man was shot and killed while he was visiting ...

A 64-year-old man was shot and killed while he was visiting his warehouse, and the police found three shell casings from a semi-automatic rifle at the scene. The main suspect is a 48-year-old man, the victim's neighbour, and he was arrested after his DNA matched the one found on the shell casings. The motive for the incident is financial gain, given that the perpetrator is a gambler.