Judging from the map Eli's place was bookended by police & fire departments. The FD likely would have been on scene with 5 minutes. However, the damage to the property looks extensive. As if an accelerant was used. The only reason I can think of why there was so much damage is that perhaps someone tampered with the smoke detectors, and maybe the home didn't meet fire safety standards.I spot areas for perp to hide within that perimeter.
I also thought we should note where the fire station is and police station.
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If perp knew this they would most likely avoid Lancaster street.