From the given line, you may link the situation with some event which caused that particular situation to happen. 'Aslam tried to run away as fast as he could, terrified lest he may be caught red handed...' Now you can perceive from the statment that Aslam might has done something wrong... i.e. he might has stolen something/took bribery/killed someone etc. and he would be trying to run away so that he might not be caught. But 'red handed' suggests that whatever wrong he has done, he is in a situation where others may catch him along with the evidence of that wrong doing. For example, he may be running with stolen/bribed money, he may have knife/pistol in his hand or people might have seen him doing some crime etc.
Now you need to construct a story from this statement. Starting from the given statment, you may continue by highlighting background of this incident, then the stated situation in which Aslam is running terrified from possilby people/police etc. you may continue by narrating furthur events leading to Aslam's arrest etc. Then you may finally conclude by giving some message etc.

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