In Austin, TX there have been many young men found in the river, known as Town Lake, aka—Lady Bird Lake, in the past few years. I do not recall that any of the cases were solved.
I think the city simply wrote off the deaths as misguided homeless men.... Makes one wonder.
Me thinks someone may be taking it upon themselves to winnow the gene pool a bit. I would laugh it off as a coincidence or several but then I remembered the original movie ‘The Mechanic’ with Charles Bronson and talk of how the best hitmen never got caught because their murders were ruled accidents or suicides and they were never looked for as murder suspects since there were no “murders” occurring.
Those incidents have been clustered around Rainey Street, a nightlife area popular with college students.