GLENDALE, AZ (AZFamily) — Glendale police confirmed a big break in the case of a man stabbed nearly two dozen times and found dead in a Glendale water retention area last November.
Investigators said “multiple arrests” have been made in the homicide of 30-year-old Grant Siefert but declined to elaborate, citing an ongoing investigation.
Siefert was reported missing on Nov. 10 after his family said they hadn’t heard from him in more than 24 hours. Family members believed he was last seen near 19th Avenue and Bethany Home Road, and somebody had his cellphone…