Kelly Carroll’s daughter was slashed to death five years ago — and she thinks the man accused of murdering the 26-year-old slipped through cracks in the system. The Pownal man charged with killing Emily Hamman was previously charged with other violent crimes and found incompetent to stand trial, meaning he was unable to take part in his own defense or understand the charges he was facing. He was court ordered to receive treatment at a psychiatric hospital. But after his mental health stabilized