Whitcombe was found dead in his office desk .sherlock narrowed the suspects down to 3 people mrs. barbara whitcombe, ray's wife, mr. jason mccubbins, ray's business partner, mr. harold nichols, ray's best friend. sherlock found a torn picture of his wife laying on the floor beside the trash can, and a ink pen in his hand. on the desk, the police found a name plate, a telephone that was off the hook, personal calender turned to july with 7891011 written on it. after examining this evidence, sherlock knew the suspect. how? ?