Dangerous Altercation at Memorial Park

Does anyone have any info on regular walker at the park who was cut up by that crazy biker at Memorial Park? Victim received 50+ stitches on palm of hand and forearm. I checked w all the official/usual places and Grizzy’s, but cannot find anything. Perp is that crazy guy who always rides bike w trailer super slow against traffic (no lights or reflectors at night) and if someone flashes lights or honks horn at him then he tries to fight them? Guy is super aggressive and been doing that for years.