Guide

How to solve a murder mystery

Most people solve a murder mystery by gut feeling and hope. Good detectives do it with a short list of habits. Here’s the checklist, and a small case to try it on.

It works for any whodunit: a murder mystery game on your phone, a party game, a novel or a TV episode. The examples lean towards games, where every clue has been put there on purpose.

The detective’s checklist

1. Build the timeline first

Before you think about who did it, work out when it happened. Write down every time you can find: the last message the victim sent, when someone arrived, when a door was opened, when a photo was taken. Most murder mysteries are solved on the clock, not on the motive.

2. Separate evidence from claims

“I was home all evening” is a claim. A time-stamped photo, a receipt or a door log is evidence. Keep two columns. Suspects can lie; the clock on a phone usually can’t.

3. Check means, motive and opportunity

For every suspect, ask three questions. Could they have done it (means)? Did they have a reason (motive)? Were they there when it happened (opportunity)? Opportunity is the strongest filter, because it’s the one you can test against the timeline.

4. Test every alibi against something independent

An alibi only counts if something outside the suspect’s own words confirms it: a timetable, a delivery, someone else’s message, a place that’s too far away to reach in time. If the only proof of an alibi is the suspect, treat it as open.

5. Listen for what people stop saying

A friend who suddenly writes in full sentences. A topic that disappears from a group chat. A deleted message, a muted contact, a reply that comes an hour later than usual. In a found phone game, the gaps are often louder than the messages.

6. Notice details that are there for no reason

Fair mysteries rarely waste words. If a game shows you a class timetable, a train delay or the battery level of a phone, ask why. A detail that seems to do nothing is often doing the most.

7. Find the one lie that only the culprit needs

You don’t have to explain everything. Innocent people lie too, usually to hide something embarrassing. What you’re looking for is the lie about the exact moment that matters, the one that only makes sense if the person was where they say they weren’t.

8. Don’t trust the loudest motive

The suspect who threatened the victim in public is the first one everyone looks at, which is exactly why writers love them. Don’t rule them out for being obvious, but don’t convict them for it either. Let the timeline decide.

9. Decide when you’ve seen enough

Some murder mystery games give you one accusation and reward you for making it early. Then the question isn’t only who did it, but how sure you need to be. If one suspect has means, motive and opportunity, and their story breaks at the moment that matters, that’s usually enough.

Try it: a small case

This mini-case was made up for this guide. It isn’t from Last Text, so nothing here spoils a case.

Victor Hale, 61, runs a vintage watch shop. On Thursday morning he’s found dead in the back office. He died on Wednesday evening. The front door was unlocked; Victor often worked late. He was struck with the brass clock from his own desk and, the medical examiner says, died within minutes. Anyone who walked in had the means, but only three people knew he’d be working late that night.

The evidence on Victor’s phone and around it:

• The studio’s timetable: Nora’s Wednesday class runs from 7:00 to 8:00 PM.
• 8:34 PM: Victor texts Nora: “Come by tonight. We need to talk about the ledger.” She never replies.
• 8:47 PM: Victor’s phone shares locations with his family. It shows Nora’s phone two streets from the shop.
• 8:52 PM: a food delivery is handed over at Sam’s door. The delivery app’s photo shows Sam taking it.
• 9:12 PM: Victor’s smartwatch stops registering a pulse.
• On his desk: the shop’s ledger, with a note in Victor’s handwriting: “$18,000 missing since March.”
• Dev’s evening: the cleaning company’s app shows him at another client’s office from 8:15 to 9:25 PM, and checking in at Victor’s shop at 9:40 PM.

Your turn. Who killed Victor, and which lie gives them away? Use the checklist, then open the answer.

Who did it? Show the answer

Working it through

1. Timeline. Victor is alive at 8:34 PM (his text) and dead at 9:12 PM (his watch). Everything happens in those 38 minutes.
2. Dev. The company app puts him at another office until 9:25 PM and at the shop only at 9:40 PM, both after Victor died. No opportunity, and no motive in sight.
3. Sam. He has the loudest motive and the threat. But at 8:52 PM he’s at his own door, 40 minutes away. To be home by then, he’d have had to leave the shop before 8:12, when Victor was still alive. Leaving after the delivery, he’d reach the shop at 9:32 at the earliest, twenty minutes too late. The independent evidence clears him.
4. Nora. Her alibi rests on a class “until 9:30”, but the timetable says it ended at 8:00. She lives across town, yet her own phone puts her two streets from the shop at 8:47 PM, right in the middle of the window. And she has a reason: $18,000 missing from the books she keeps, the reason Victor wanted to see her.
5. The one lie. Nora didn’t lie about something embarrassing. She lied about the exact hour of the murder. That’s the lie only the culprit needs.

Notice what solved it: not a confession or a dramatic clue, but a timetable, a delivery photo and a dot on a map. Ordinary details, checked against the clock.

Mistakes that make you accuse the wrong person

• Locking in on the first suspect and reading every later clue as proof.
• Treating statements as facts because they’re written down.
• Ignoring the clock: time stamps, travel times and opening hours solve more cases than motives do.
• Needing to explain everything before you accuse. You need the contradiction that matters, not every loose end.
• Falling for the red herring: the suspect with the loudest motive and the weakest opportunity.

Solving a murder mystery game on your own

Most murder mystery games are made for a group. Playing alone is different: nobody talks you out of a bad theory, so a few habits help.

• Keep a note with your timeline and update it as new evidence arrives.
• Write down each suspect’s claim word for word, so you can test it later.
• Before you accuse, say your case out loud in three sentences: when, how, and the lie that gives it away. If you can’t, keep reading.

That’s exactly how Last Text plays. Each case is a stranger’s phone, the clock keeps moving and new messages keep arriving, and you get one accusation. See how to play, or start with Case 01: it’s free, and it’s a gentle way to practise before the murder cases.