The combination of charges here is serious and the exposure is significant. Idaho treats these matters similarly to other states but the specific sentencing ranges reflect how seriously the law views violent offenses, particularly strangulation.
Attempted strangulation is the charge that carries the most weight. In Idaho and across most of the country, strangulation has been elevated in recent years from a misdemeanor assault to a felony in its own right, specifically because research has established it as one of the strongest predictors of escalating domestic violence and potential homicide. Idaho Code treats strangulation as a felony carrying substantial prison time, potentially up to life imprisonment in the most serious circumstances depending on how the charge is filed and what the prosecution can prove.
Assault and battery charges stack on top of that. The broken cell phone adds a destruction of property or evidence charge that is relatively minor on its own but contributes to the overall picture the prosecution presents.
The critical variables are his prior criminal history and the specific circumstances of the incident. A prior history of violence, particularly domestic violence, changes the calculus dramatically and prosecutors in Idaho pursue repeat offenders aggressively. The relationship between him and the victim, whether children were present, and whether any injuries required medical treatment all factor into how the charges get filed and how hard the prosecution pushes.
He needs a criminal defense attorney in Valley County immediately. The early stages of this process, before charges are formally filed and before any statements are made, are where the outcome gets shaped. Do not wait on that.