Utah mom accused of husband's murder faces defense's claim of insufficient evidence.

New details have emerged in the case of Kouri Richins, a Utah widow accused of killing her husband with a lethal dose of fentanyl. Prosecutors allege that Richins searched for information on fentanyl, life insurance payments, and police investigations on her phone. Her defense argues that there is no substantial evidence to support the charges and that Richins had the right to withdraw money from their joint accounts. The defense also points to discrepancies in witness testimony and allegations that some of Eric Richins' financial documents may have been forged.