Live Updates: Motive still unclear in Boulder mass shooting

Authorities have not yet released any information about a possible motive behind Monday's shooting at a grocery store in Boulder, Colorado, that left 10 people dead. The 21-year-old suspect has been charged with 10 counts of first-degree murder. 

Ahmad Al Aliwi Alissa, who is from a Denver suburb, was booked into jail on murder charges Tuesday and was expected to make a first court appearance on Thursday. The victims he is accused of killing were between the ages of 20 and 65. Among them was a Boulder police officer, 51-year-old Eric Talley, a father of seven children, who responded to the shooting.