PA 5.2: Jewel Heist

Author

The names of your group members go here!

library(tidyverse)

Solve the Mystery

Just down the road in Montecito, CA several rare jewels went missing. The jewels were stolen and replaced with fakes, but detectives have not been able to solve the case. They are now calling in a data scientist to help parse their clues.

A camera was located near the building where the jewels went missing, so the detectives have provided you with a list of people who may have entered the building. This list includes the date and time they were spotted on the camera, in Pacific Standard Time (PST).

Unfortunately, the date and time of the jewel heist is not known. You have been hired to crack the case. Use the clues below to discover the thief’s identity.

suspects <- read_csv("https://raw.githubusercontent.com/zoerehnberg/STAT331-S23/main/practice_activities/suspects.csv")

dim(suspects)

[1] 214   3

# 214 total suspects

The crime was committed in Montecito, CA, so we need to make sure the time zone for these dates are correct. Modify the Time.Spotted variable to have the correct time zone.

Based on the cleaning schedule for the room where the jewels are held, the heist was not committed in the morning.

# After this step you should have 112 suspects left

The room where the heist was committed is closed on Tuesdays and Thursdays (and there were no signs of forced entry), so the heist did not happen on those days.

# After this step you should have 78 suspects left

It is believed that the heist was committed within 5 weeks (35 days) of Thanksgiving 2022. Hint: Pay attention to time zones!

# After this step you should have 11 suspects left

The detectives partially decoded a message from the thief to a notorious fence in Iceland. In it, the thief said the job would be done “after the sun sets for you, but before midnight.” Hint: When does the sun set in Iceland at that time of year?

# After this step you should have 4 suspects left

The thief left behind a receipt at the scene of the crime. The receipt is smudged, but the day of the month is shown to be 22. It is thought that the heist took place no more than three days after the receipt was issued.

# After this step you should have 2 suspects left

The thief is amused by your efforts and has sent you a cryptic clue:

“The exact number of seconds between midnight on Jan 1, 1970 and the time I arrived on the scene is divisible by 6.”

# You should end with 1 suspect left

Canvas Quiz Submission

Who is the thief? Only one name should remain.

--- title: "PA 5.2: Jewel Heist" author: "The names of your group members go here!" format: html embed-resources: true code-tools: true toc: true editor: source execute: error: true echo: true message: false warning: false --- ```{r} #| label: setup library(tidyverse) ``` ## Solve the Mystery Just down the road in Montecito, CA several rare jewels went missing. The jewels were stolen and replaced with fakes, but detectives have not been able to solve the case. They are now calling in a data scientist to help parse their clues. A camera was located near the building where the jewels went missing, so the detectives have provided you with a list of people who may have entered the building. This list includes the date and time they were spotted on the camera, **in Pacific Standard Time (PST)**. Unfortunately, the date and time of the jewel heist is not known. You have been hired to crack the case. Use the clues below to discover the thief's identity. ```{r} #| label: read-in-data suspects <- read_csv("https://raw.githubusercontent.com/zoerehnberg/STAT331-S23/main/practice_activities/suspects.csv") dim(suspects) # 214 total suspects ```  1. The crime was committed in Montecito, CA, so we need to make sure the time zone for these dates are correct. Modify the `Time.Spotted` variable to have the correct time zone. ```{r} #| label: set-correct-tz ``` 2. Based on the cleaning schedule for the room where the jewels are held, the heist was not committed in the morning. ```{r} #| label: crime-not-committed-in-morning # After this step you should have 112 suspects left ``` 3. The room where the heist was committed is closed on Tuesdays and Thursdays (and there were no signs of forced entry), so the heist did not happen on those days. ```{r} #| label: crime-not-committed-on-tuesday-or-thursday # After this step you should have 78 suspects left ```  4. It is believed that the heist was committed within 5 weeks (35 days) of Thanksgiving 2022. *Hint: Pay attention to time zones!* ```{r} #| label: crime-committed-within-5-days-of-thanksgiving # After this step you should have 11 suspects left ``` 5. The detectives partially decoded a message from the thief to a notorious fence in Iceland. In it, the thief said the job would be done "after the sun sets for you, but before midnight." *Hint: When does the sun set in Iceland at that time of year?* ```{r} #| label: crime-committed-after-sunset-before-midnight # After this step you should have 4 suspects left ``` 6. The thief left behind a receipt at the scene of the crime. The receipt is smudged, but the day of the month is shown to be 22. It is thought that the heist took place no more than three days after the receipt was issued. ```{r} #| label: crime-committed-within-three-days-of-the-22nd # After this step you should have 2 suspects left ```  7. The thief is amused by your efforts and has sent you a cryptic clue: > "The exact number of seconds between midnight on Jan 1, 1970 and the time > I arrived on the scene is divisible by 6." ```{r} #| label: crime-committed-message # You should end with 1 suspect left ``` ## Canvas Quiz Submission Who is the thief? *Only one name should remain.*