YAKIMA, Wash. — A Grandview man was sentenced to just over 19 years in prison Tuesday for gunning down another man described as his longtime nemesis.

Alejandro Guadalupe Martinez, who turns 21 next week, pleaded guilty last month in Yakima County Superior Court to second-degree murder for the Dec. 3, 2011, shooting of 18-year-old Mariano Cuevas.

As part of his plea deal, Martinez was free to try to persuade the court to sentence him to the bottom of the range — 123 months plus the 60-month firearm enhancement, or just over 15 years.

Prosecutors asked for a midrange sentence of 171½ months, plus a firearms enhancement of 60 months, or just over 19 years. That’s what Judge David Elofson chose.

Police described the shooting in the driveway of Cuevas’ Grandview home, in the 600 block of East Second Street, as the culmination of a series of disputes between Martinez and Cuevas.

In an affidavit to the court, Martinez alleged Cuevas was a BGL Sureño and said he shot Cuevas, who was unarmed, after Cuevas insulted his pregnant girlfriend and made a threatening gesture as if he was going to pull out a gun.

Neighbors said the Cuevas home was no stranger to police, and court records showed he had a juvenile criminal history of residential burglary and car theft.