Prosecutors say Brian Walshe told authorities he left his house on Jan. 2 — the day after Ana Walshe was reportedly last seen — only to get ice cream for his son. But police say they found surveillance video of him inside a Home Depot that same day. Subscribe to WCVB on YouTube now for more: http://bit.ly/1e8lAMZ Get more Boston news: http://www.wcvb.com Like us: https://www.facebook.com/wcvb5 Follow us: https://twitter.com/WCVB Instagram: https://www.instagram.com/wcvb5/