As soon as they arrived at the police station, Eve saw Reginald Bates, who had clearly just gotten there as well.
Eve followed him into the police station and asked, "What's going on?"
Reginald started, "We've caught a very important witness."
A witness...
Eve narrowed her eyes: "Who?"
"Strict control of explosives is exercised in our country. The explosive was homemade, and we traced it to a store selling chemicals. According to the store owner, someone bought chemicals from his store in five separate transactions, and that person was Irvin Sharman. The list of chemicals purchased matches what we found in the exploded room," Reginald explained.
In other words, Irvin bought those chemicals to make the bomb!
Upon hearing this, Eve's eyes narrowed and she immediately asked, "Now that we have this witness, can we file a case and arrest Irvin Sharman?"