Help me find my brother Sergio after 16 years apart

In 2010 near Houston, I lost the person who meant the world to me — my brother, Sergio. There was no work, no food, no future. The journey north felt like our only hope. Sergio was 51 years old at the time. The separation happened because of crossing the border near Houston. What I miss most is the way they would hum while doing chores around the house. The messages suddenly stopped in 2011. We've heard nothing since. Sergio would be around 67 years old now. I'd recognize them anywhere — thin and wiry, always moved with quick energy. I promised myself I would find them before it's too late. If anyone has any information about Sergio, please reach out. We are not looking for trouble, just closure — or better, reunion.