The National Association of Writers in Education based in the UK has posted an anthology call for "Witness: Crime and Execution". They're looking for stories up to 5000 words about crime in a specific place, preferable from the North East UK but also open to other countries and places. The deadline is June 1, there is no mention of payment so that's something you'll have to query. You can find the call here.
Thanks to Michael Bracken for the link!