32 NoraChanning drew the paper closer and studied it.
“They added numbers to the second paragraph,” she said to Quinn. “Crossed the same numbers out in the third.”
Nora focused on Rob. “What do these changes mean?”
“The typewritten draft contains the chemist’s original classification of the nine floor samples.” Rob’s smile had vanished. His serious expression matched his tone.
Tapping a finger on the paper, he added, “In the second paragraph, the typewritten text indicates three samples tested positive for heavy petroleum distillates. All three were taken from the bedroom floor.”
Nora blinked. “Only three from the bedroom tested positive? And no samples taken from the living room tested positive?”
Rob shook his head. “Not according to this first draft.”
“In the next paragraph,” Chan
