Roses are Red: James Patterson

This book was part of the Alex Cross series. His daughter is in the hospital for a portion of the book getting a brain tumor removed. He and his new "baby's momma" decide to spend time apart. Another woman shows up for his tough patch, a fellow FBI agent becomes his new love interest. It seems like if the women aren't family members they have to be with either the villain or the love interest and sometimes both. Anyway, he figures out the "Mastermind" behind the bank robbery's /killing sprees is someone in the insane asylum. At the end of the book we find out when Alex does not that Kyle Craig, the head of the FBI and Alex's friend, is the mastermind behind the terror in town.