I've never written a crime drama before but I think the new book launch by My Weekly might provide a good stepping stone into the genre. The Intrigue and Suspense genres are two very different brands. Intrigue could I think be classed less gritty and Suspense more hard nosed.
I quite like reading 'cosy' murder mysterites, rather along the Murder She Wrote lines, Simon Brett Fethering mysteries, Miss Marple and M C Beaton's Agatha Raisin series. The guidelines say 'Who - amateur sleuths' so I am presuming 'cosies' would fall into this category.
I think it's a good idea to stretch the writing muscle by going for something different. Murder mysteries would require quite a bit of planning. There would be alibis, false and real, a list of suspects, motive and action. The scenario would also have to be carefully thought out. Unless you were going for a period piece like a typical country house murder mystery of say the twenties. you would have to think up a good reason as to why everyone was together and the reason for a feud. Weddings and other family gatherings always provide good material.
I understand these novellas will be displayed amongst the magazines. I hope they are given good prominence. Has anyone had one accepted yet or got any thoughts on the new line?