Gumshoe step-by-step solution by pjg
For game release 1.  Takes about 270 moves
Comments and points are in ()


Event timeline (times will vary somewhat)
8:58  Game starts
9:20  Marge arrives at McMurtry office
11:12  Sandra Mcbride leaves Highland
11:18  Sandra arrives in your office
11:26  Sandra leaves your office
11:32  John Mcbride and Nicole Updike leave logitek
11:40  John and Nicole arrive at Giuseppe's
12:42  Detective Boggs arrives at Giuseppe's
12:10  John, Nicole, and Detective Boggs leave Giuseppe's
12:40  John and Nicole arrive at Winchester
12:50  John leaves Winchester
12:52  Sandra arrives at Highland
2:04  Marge leaves your office
2:30  Baseball game starts
5:00  Baseball game ends
5:04  Alibi bar opens
5:18  Billy arrives at Alibi
6:58  John arrives at Lincoln
7:00  TV store closes
11:12  John leaves Lincoln
11:16  John arrives at Highland
12:32  Thugs beat you up (lose)
2:08  Alibi bar closes
7:00  Game over (lose)

You can meet the thugs anytime North of your office.
Detective Boggs appears at random.


McMurtry office:
  z.z.z.z.z
  z.z.z.z.z
  Get newspaper then read it
  S
  Remove coat
  Put coat on coat rack
  Search desk (1/1)
(Marge will always get up to close the office door)
  Wear camera
  E
  X desk
  Search papers
  Read note (1/2)
  Read bill
  Get envelope then read it
  Open drawer
  Get handkerchief (1/3)
  save game

  Wait until 11:16
  z.z.z.z.z.z
  Sandra, sit down (1/4)
  Offer handkerchief to Sandra (1/5)
  X Sandra
  Yes
  W
  Open door
  Ask Marge about logitek
  N, E, E
  Hail cab. Enter cab. Cabbie, go to logitek (1/6)
Logitek:
  Exit
  N
  Show license to Barbara. Drop license
  Show snapshot to Barbara. Drop snapshot
  Read funeral. Show funeral to Barbara
  save game

  S
  Hail cab. Enter cab. Cabbie, go to Giuseppe (1/7)
Giuseppe:
  Exit
  X John
  X Nicole
  Wait. again
(until Boggs arrives and then enters the restaurant)
  X sedan
  X tires
(Tires!  What tires?)
  X valve
  Push pin
  Hail cab. Enter cab.
  Wait. again
(wait for John and Nicole to leave in a cab)
  save game

  Cabbie, follow the blue cab (1/8)
Winchester:
  Exit
  Wait. again
(until the couple embraces)
  Take photo of couple (1/9)
  Wait. again
(until John leaves)
  Open door
  Look in the window
  X guard
  X cap
  Ask guard about baseball
  Read sports then drop newspaper
  SW
  z.z.z.z.z
(wait until the old man leaves)
  X TV
  Turn knob
  g
  g
  g
(until the talk show is on)
  E
  Wait until 2:30
  Open door (1/10)
  W. Get matchbook. E (1/11)
  X matchbook then drop it
  save game

  Hail cab. Enter cab. Cabbie, go to Alibi
Alibi:
  Exit
  Read placard
  Wait until 5:04
  N
  Ask bartender about drinks
  Buy beer
(you may have to wait for your turn)
  Wait. again
(until the bartender slides the beer to you)
  Get beer
(the skinny man should enter the bar)
  I
  Show incriminating to bartender
  Drop incriminating
  Offer beer to Billy
(keep offering it until he accepts)
  Ask Billy about Lydia (1/12)
  Get dart. Throw dart at board (1/13)
(Repeat this again until you get a bullseye)

 (X jukebox)
 (Put money in jukebox)
 (Push forward (see what albums are available))
 (Look at album 14)
 (Play song 7 on album 14)
  save game

  S
  Hail cab. Enter cab. Cabbie, go to Lincoln
Lincoln:
  Exit
  X gate
  Untie rope. Untie rope
  Get rope. Open gate
  S, S (1/14)
  Search scraps (1/15)
  U
  Push crate under balcony
  Stand on crate
  Tie rope to balcony
  Drop all
  U, E (2/17)
  X window. Clean window
  Look in the window
  Wait. again
(until John shows up around 7:04)
  Take picture of couple (1/18)
  Remove camera then drop it
  W
  Drop naughty
  D, D
  Get all but crate
  N, N
  save game

  Hail cab. Enter cab. Cabbie, go to office
McMurtry office:
  Exit
  W, W
  Read note. Look under the mat (1/19)
  Unlock door with key. Drop key. Open door
  S, E
  Get receiver
  Read card then drop it
  Dial 653-2720
  Tell Sandra about naughty (1/20)
  Put receiver on phone
  W, N, E, E
  Hail cab. Enter cab. Cabbie, go to Highland
Highland:
  Exit
  Knock on the door
  Show naughty to Sandra (1/21)
  Open door
  W
  save game

  Hail cab. Enter cab. Cabbie, go to office
Office:
  Exit
  N
  X Morty
  X Vincent
  X Roderick
  X cards
  Give hundred to Roderick
  g
  g
  g
  g (1/22)
  S
  Put hundred in envelope
  g
  g
  g
  g
  Close envelope
  X stamp machine. I
  Put money in stamp machine. I
  Smooth crumpled. I
  Put dollar bill in stamp machine (1/23)
  Lick stamp
  Put stamp on envelope
  Objects. Places
  save game

  Put envelope in mailbox (1/24)
  Full
  Amusing


The endgame has a list of interesting things to do.

Here are a few more things to try...
Have you managed to ride in all three cabs?
Have you ever left something behind in a cab?
Have you found out who Horace is?
Have you seen Sandra's father?
Have you examined the handkerchief?
Have you learned the name of Howard's sweetheart?
Have you shown the naughty photo to Billy or the Bartender?
Have you examined the posters in the bar?
Have you looked at the thugs's cards?
Have you kissed Marge?
Have you pulled Marge's bun?