Would Covid masks help criminals get away with it? It was the question posed by police, academics and many others when face coverings became ＿＿（51）＿＿ in shops and other places last year. Now, it seems, they have their answer as Kent police in the UK say catching a person guilty of a crime has become even ＿＿（52）＿＿ as putting together an accurate efit (electronic facial identification technique) –which officers use like wanted posters – is difficult when the person ＿＿（53）＿＿ is wearing a mask. Susan Morrison, a civil supervisor at Kent police's identification office, said, "We are seeing an increase in reports of guilty people wearing masks. And while we view each case separately, sometimes it can be more stressful for the victim to go through the process of making an efit, than the result is useful to the investigation." The phenomenon is ＿＿（54）＿＿ limited to the UK. US media outlets have reports on a couple in Connecticut committed a series of crime in a day, during which they are accused of robbing several shops while disguised in medical masks. In order to ＿＿（55）＿＿ an increase in mask-assisted crime, professors at Leeds University's law school warned shop owners to look out for robbers returning for a second bite of the cherry. This is because they know that successful commercial robbers return to the same, nearby or same-type places.