German President Frank-Walter Steinmeier is to attend a minute’s silence in memory of murdered police officer Rouven Laur at 11:34 am (0934 GMT) in the market square of the south-western city of Mannheim on Friday. Premier Winfried Kretschmann of the state of Baden-Württemberg, where Mannheim is located, and the state’s Interior Minister Thomas Strobl are also expected to be there. One week after the fatal knife attack on the market square, the German president plans to lay a bouquet of flowers at the scene of the crime. At 6 pm, the far-right Alternative for Germany (AfD) party plans to demon…