In the short story Greenshaw's Folly, Inspector Welch is the investigating officer in the Miss Greenshaw murder case.
Portrayals[]
In the 2013 ITV adaptation of Greenshaw's Folly, Inspector Welch is portrayed by John Gordon Sinclair. As a policeman stationed near St. Mary Mead, he already knows Miss Marple well. He tells her he and his colleagues had been having a sweepstake on when she would next turn up at the station.