AC468 Unit 7 Forensic Timeline Reconstruction Example

Reviewed by Chester Goodwin, MBA Digital Forensics and Investigative Techniques Purdue University Global Free custom sample in 24 to 48h

This AC468 Unit 7 timeline reconstruction opens on a daylight saving trap: Chicago and Andalusia were six hours apart, not seven, from March 8 to March 29, 2026. Purdue Global AC 468, Digital Forensics and Investigative Techniques, expects BS in Accounting students to merge sources here. For Belmonte Fine Foods, a composite Chicago importer of Spanish foods, seven sources feed a forty-one-row master table ordered by UTC, from NTFS and Edge times to a FAT32 drive that stores no zone, an ERP log in Central time and an Eastern bank wire. A source key states each zone and flags assumed ones. Four clusters, March 12, 13, 17 and 18 to 19, are tested, and three clock problems are shown not to change the order of events.

CourseAC468 Digital Forensics and Investigative Techniques
UnitUnit 7
Paper typeTimeline reconstruction
LengthAbout 700 words, 5 pages double-spaced
FormatAPA 7 student paper
SchoolPurdue University Global
ProgramBS in Accounting
UpdatedOctober 2026

Free sample paper for AC468 Unit 7

1

Six Hours, Not Seven: A Unit 7 Timeline Reconstruction That States Every Source's Recorded Zone

[Student Name]

Purdue University Global

AC468: Digital Forensics and Investigative Techniques

Unit 7 Timeline Reconstruction

[Instructor Name]

[Date]

Belmonte Fine Foods, its staff and every timeline entry are composite; the articles cited are real; daylight saving dates are the actual 2026 dates.

What this part is doingOpening on the daylight saving gap shows why the source key comes before the table.
2

Source Key

Each source records time its own way, so the key states the native format, the zone and whether that zone was recorded or assumed.

1. Laptop file system and registry: NTFS and registry times are stored in UTC. Recorded.

2. Edge history: microseconds since 1601 in UTC. Recorded.

3. Flash drive FAT32 directory: local time with no zone at all. Assumed to be the laptop's Central setting, flagged as assumed.

4. Mailbox audit log and message trace: UTC. Recorded.

5. Tenant sign-in log: UTC. Recorded.

6. ERP vendor master change log: Central local time without an offset. Assumed Central from the server's configuration, flagged as assumed.

7. Bank wire record: Eastern local time with the offset printed. Recorded.

The spoofed message's Date header claims +0100. It is listed as the sender's claim and never used to place an event; the Received times written by Belmonte's provider are used instead.

The Master Table

The full table has forty-one rows. Each gives the UTC time, the time as the source recorded it, the zone and whether it was recorded or assumed, the source and artifact, the event, and what it supports. Rows that share a moment from different sources are placed together so that corroboration can be seen. Laptop rows carry a note on the 2 minute 14 second clock lag measured at acquisition.

Four Clusters

March 12. At 17:31 UTC the Edge profile requests the registrar's checkout page for the lookalike domain (source 2). Public registration data gives the domain's creation as March 12 at 17:34 UTC. Two independent sources agree within three minutes.

March 13. The flash drive is first connected at 19:02 UTC (source 1). The FAT32 directory gives the letter's creation as 14:05 local time (source 3), which is 19:05 UTC only if the Central assumption holds; the document's internal metadata, stored in UTC, also says 19:05. The assumption is supported.

March 17. The profile requests the webmail login page at 15:06 UTC (source 2), Word opens the letter for the last time at 15:21 UTC (source 1), the message arrives at 15:38 UTC (source 4) and the inbox rule is created at 15:50 UTC (source 4).

March 18 and 19. The ERP log records the supplier's bank details changed at 09:12 Central on March 18 (source 6), which is 14:12 UTC because Central was on daylight time, five hours behind UTC. The wire record shows $186,450 released at 10:40 Eastern on March 19 (source 7), 14:40 UTC.

A timeline is only as reliable as its weakest clock, so every row says whether its zone was recorded by the source or assumed by the examiner, and the assumed rows are tested against a recorded source wherever one exists.

What this part is doingThe highlighted sentence explains why the zone column exists, the point graders look for in a reconstruction.
3

Clock Problems and Why None Changes the Order

Three clock issues were examined. The first is the daylight saving gap. Between March 8 and March 29 the supplier's office was six hours ahead of Chicago, not seven. Applying the usual seven-hour gap would shift the supplier's genuine emails by one hour; none of them sits within an hour of a key event, so the order holds. The second is the FAT32 assumption, which is tested above against the document's own UTC metadata and holds. The third is the laptop's 2 minute 14 second lag, which affects only file system times written before the laptop last synchronized; the largest affected gap between two clustered events is eleven minutes, so the lag cannot reverse them.

Building one timeline from many sources is the standard method for showing sequence, and automated tools can merge sources but cannot decide which assumptions are safe (Hargreaves & Patterson, 2012). Correlating one source's times against another's is how the provenance of a timestamp is established (Schatz et al., 2006), and NTFS keeps several timestamp sets whose rules must be understood before any one is trusted (Chow et al., 2007).

What this part is doingEnding on the tests applied to each assumption shows the order of events was checked, not presumed.
4

References

Chow, K.-P., Law, F. Y. W., Kwan, M. Y. K., & Lai, P. K. Y. (2007). The rules of time on NTFS file system. Second International Workshop on Systematic Approaches to Digital Forensic Engineering, 71-85. https://doi.org/10.1109/SADFE.2007.22

Hargreaves, C., & Patterson, J. (2012). An automated timeline reconstruction approach for digital forensic investigations. Digital Investigation, 9, S69-S79. https://doi.org/10.1016/j.diin.2012.05.006

Schatz, B., Mohay, G., & Clark, A. (2006). A correlation method for establishing provenance of timestamps in digital evidence. Digital Investigation, 3, 98-107. https://doi.org/10.1016/j.diin.2006.06.009

What the AC468 Unit 7 assignment asks for

The seventh AC468 unit asks you to combine findings from many sources into one timeline. Before the table, write a source key giving each source's native time format, its zone and whether that zone was recorded by the source or assumed by you. Convert every entry to UTC, keep the original time beside it, and flag assumed zones. Order the table strictly by UTC and place simultaneous events from different sources together. Then narrate the key clusters of activity, stating which entries corroborate each other and which stand alone. Test every assumption you made, such as a zone for media that store none, against a recorded source. Examine clock problems, including daylight saving differences and device clock drift, and show whether any could change the order. Cite timeline and timestamp research in APA 7.

Inside the AC468 Unit 7 example

The sample's source key lists seven sources, from NTFS and registry times stored in UTC to a FAT32 directory and an ERP log with no recorded zone, each flagged. The spoofed message's Date header is listed as a claim and never used. The master table is described with its columns and the laptop's clock note. Four clusters follow: the March 12 registrar request and domain creation three minutes apart, the March 13 drive connection and letter creation, the March 17 sequence ending in the inbox rule, and the March 18 to 19 vendor change and wire. The highlighted sentence explains the zone column. A last section works through the daylight saving gap, the FAT32 assumption and the clock lag, with citations to Hargreaves and Patterson, Schatz and Chow.

Where the points sit in the AC468 Unit 7 rubric

AC468 timelines are graded on accuracy of conversion and on transparency about assumptions. Points go first to a source key that states each format and zone, because without it no row can be checked. Graders look for UTC ordering with original times preserved, assumed zones flagged and those assumptions tested against recorded sources. Clustered narration that shows corroboration earns more than a bare table. The rubric rewards students who catch daylight saving differences between jurisdictions and who check whether clock drift could reverse any sequence. Timelines that silently assume a zone, or that place events in local time from mixed sources, lose substantial credit. APA 7 references to timeline research support the method.

AC468 Unit 7 help from the desk

Many Unit 7 timelines mix UTC and local times in one column, which quietly reorders events. Assumed zones are not flagged, so a reader cannot tell which rows are solid. Sender-controlled times, such as an email Date header, are used to place events. Daylight saving is applied as if every country changed clocks on the same date. Device clock drift measured at acquisition is never carried forward. Narration repeats the table rather than explaining which entries support each other. When your section hands you its own earlier findings or a new scenario, we can assemble the source key and table from those materials with every assumption tested.

Get an AC468 Unit 7 example written to your instructions

Because a timeline draws on every earlier artifact, findings from previous units belong in the Unit 7 request, together with the scenario's locations and time zones, the prompt and the rubric. Every row carries its recorded zone and a UTC time, with assumptions flagged. The first custom timeline is free, back in 24-48h. The paper above is an original model document written by our desk, not a submitted student paper and not an official Purdue University Global document.

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AC468 Unit 7 questions, answered

Why does the timeline show both UTC and the original time?

UTC puts every source on one reference so events can be ordered. The original time, exactly as the source recorded it, lets anyone check the conversion against the evidence. Showing both, with the recorded zone in its own column, means a reader never has to trust the conversion without being able to repeat it.

What happens when a source records no time zone at all?

The timeline has to assume one and say so. FAT32 media, for example, store local time without an offset, so their entries are converted using the zone of the computer that wrote them, flagged as assumed, and checked against another source that did record a zone, here the registry entries for the same device.

Can the timeline be built from my earlier units' findings?

Yes. Send the artifacts and findings your section produced earlier, the scenario's location and time zone details, the prompt and the rubric. Entries are normalized to UTC, recorded zones and assumptions are shown for every row, and the narrative groups events so that corroboration and gaps are both visible.

Where can I find a free AC468 Unit 7 sample paper?

This page holds a full AC468 Unit 7 timeline reconstruction for Belmonte Fine Foods with a seven-source key, a forty-one-row UTC table, four clusters, clock tests and APA 7 references.

How is the FAT32 time zone assumption tested?

FAT32 stores local time with no zone, so the letter's 14:05 directory time was converted using the laptop's Central setting. The document's own metadata, stored in UTC, gives 19:05, which matches that conversion, so the assumption holds.