new delhi a upbased gang may be behind the murder of a 40yearold jeweller who was shot dead inside his showroom during a robbery bid on june 12 investigators probing the case suspect the special cell and crime branch are also working on different leads and around 500 people have been questionedthe deceased hemant kaushal ran a jewellery shop in the name of h r jewellers in northwest delhis adarsh nagar he was shot at least thrice in front of his 12yearold son the prime witness in the case after he tried to resistpolice have released cctv grabs of one of the suspected killers and also announced a reward of rs 1 lakh for information on him or others in the footage obtained by police from another shop the suspect is seen keeping a watch on the target shopapart from a few criminals cops also suspect the involvement of an insider or employee of another jewellery shop in the area who may have given a tip we have scanned the list of present and former employees of the jeweller but havent got any clue yet some people from outer delhi are also being examined said an officerthe officer added that the showroom was located amidst a market place and on any other day the robbers would not have managed to run away on their motorcycle simply due to the traffic on the road outside they chose to strike on tuesday when majority of the shops are closed they were well aware of the topography of the area he addedthe family has told police about a man who had come to their showroom a month before the incident and asked for some items to be exchanged he was found carrying the bill of another shop the victims employee ashok kumar has also told cops that five minutes prior to the incident a man had entered the shop asking for a change but left soon after the men entered wearing helmets and asked everyone to lie on the floor after looting the jewellery they were moving out but the shop owner tried to grab the bag following which they shot him a police officer said