 Seated in a wheelchair on the shelter's bottom floor, Shahideen Craig called... She's 32. I'm sorry, that's a he. Called Zylazine's infiltration of the drug supply chemical warfare. His right leg was amputated in November. Heroin was strong, but it wasn't taking limbs, he said. Kim Boroskis, age 54, changes the bandages on wounds on her legs every other day before pulling on shoes from a collection she keeps at the shelter.