Three men approached the teen and his friends before the attack occurred.
Bond set at $100,000 for Jackie Carter III, 28.
Victims are expected to survive.
Investigators are working to identify the remains.
The blaze occurred in the 2400 block of Caledonia Street.
Blaze broke out in 1700 block of Lagrange Street.
A GoFundMe account has been set up to help pay for funeral expenses for Kristoffer Staler, 38.
Equipment going to Puerto Morelos, a small Caribbean fishing village south of Cancun.
Six people were displaced by a blaze in the 3200 block of Brock Drive.
The fire occurred in the 1700 block of Roosevelt Circle.