Birmingham is trialling a new app, which lets you pay for items via your mobile phone.
Droplet has been designed by two entrepreneurs in the city and is being used by more than 50 businesses so far.
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Six Polish men were found at the two businesses, some living at sites, they are thought to have been paid around £1 an hour.
Tahir Mahmood was detained by Police as he was attempting to climb into the roof space of an out-building at his family’s home.
Family man Mr Javeed was the owner of Digbeth business Direct Source 3 and was shot and killed on February 3.