Compare the park patrol log to the forensic analysis report. What is the significance of the park patrol log?

The park patrol log is important because it gives us information about when and where Summer's killer disposed of important items (like the murder weapon). The park patrol log shows that Nathaniel Martinez discovered items in a bag at Highland Park. These items were analyzed in the forensic analysis report, and one of them was identified as the murder weapon (a trophy).

Based on the park patrol log, when could Summer's killer have disposed of the items that Nathaniel Martinez found?

Nathaniel Martinez patrols two zones of Highland Park every 15 minutes (zones A and B). Nathaniel first sees the suspicious bag at 10:35AM in zone A, which means that Summer's killer must have disposed of the items within the previous 15 minutes, while Nathaniel was patrolling zone B. In other words, Summer's killer was in zone A between 10:20AM and 10:35AM.

Are any suspects accounted for between 10:20AM and 10:35AM?

Look at the cell phone data analysis report.

The cell phone data analysis report says that between 10:08AM to 10:22AM, the cell phone with the number 248-114-1811 travelled northwest from 227 Elmont Crescent by car, and from 10:23 AM to 10:30AM, was between 308 and 314 Yonge Street.

Look at the Highland Park map. Summer's killer was in zone A of Highland Park between 10:20AM to 10:30AM. Could the person with the cell phone number 248-114-1811 have been in zone A of Highland Park between 10:20AM and 10:35AM?

If you're not sure who the cell phone belongs to, read the witness statements.

Medina's cell phone number is 248-114-1811. The cell phone data analysis report is about Medina's phone.

Summer's killer was in zone A in Highland Park between 10:20AM and 10:35AM.

Based on the cell phone data analysis report and the Highland Park map, Medina was accounted for between 10:20AM to 10:30AM. Could she have made it to zone A of Highland Park by 10:35AM? Check the last known location of Medina's cell phone and look at the Highland Park map. If you're not sure how fast Medina could have driven, look at the Officer Notes notebook for speed limits.

Summer's killer disposed of items (detailed in the forensic analysis report) in zone A of Highland Park between 10:20AM and 10:35AM. Medina couldn't have disposed of these items because she was accounted for between 10:20AM and 10:30AM (based on her cell phone location) and was too far away to make it to zone A by 10:35AM.

At 10:30AM, Medina was between 308 and 314 Yonge Street — which is roughly 5-6 miles from zone A of Highland Park. To reach zone A by 10:35AM, Medina would have had to have driven between 60-72 mph (which is way above the 25 mph speed limit). Medina would likely have needed to go even faster than that (to account for parking, getting to zone A, disposing of the items, and leaving undetected). This is unrealistic — Medina couldn't have made it to zone A by 10:35AM.

We can eliminate Medina based on: the park patrol log, the forensic analysis report, the cell phone data analysis report, and the Highland Park map.