Out of the Cold (Robyn Hunter Mysteries)

"Please," I said. It was all I had the chance to say. He looked at me, then at the stairs behind me. He rushed at me and pushed hard, throwing me off balance. I reeled backward, stumbled over, and started to fall. After a homeless man dies during a cold winter night, Robyn and her friends work to uncover who the man was before his time on the streets. They have only two clues to guide them: a class ring and an old photograph that the man left behind. Robyn just wants to honor the homeless man€s memory. But as the search heats up, she begins to suspect that someone€s investigating her too. . . .