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Armed robber who killed ‘hardworking and beloved’ mother at Houston gas station gets life in prison

Donna Pena, mother of two, was shot to death during a robbery five years ago while trying to pick up extra hours at her convenience store job.

Donna Pena was gunned down while working behind the counter of a Shell gas station March 8, 2019. (Copyright 2024 by KPRC Click2Houston - All rights reserved.)

Houston – A Houston mother of two was killed while working at a gas station five years ago. Now the gunman, Marcus Kenneth Cox-Davis, has cut a deal that sends him to prison for life and keeps him there for at least the next 30 years.

“This defendant had no regard for anyone else when he used a gun to rob and steal, and now the victim’s family will never again see this hardworking and beloved woman,” Harris County District Attorney Kim Ogg said.

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Donna Peña was behind the counter at the Shell station on FM 1960 and Perry Road on March 8, 2019 picking up some extra hours, according to her fiance. Shane Coyle told KPRC 2 that’s the only reason Peña was there that night when Cox-Davis came in with a gun.

Assistant District Attorney Chandler Raine, who helped prosecute the case said Peña, 32, was basically ambushed. “He gave this woman about two seconds to open the cash register before he opened fire, killing her.”

The store’s surveillance video from that night showed a gunman in a blue hoodie. Detectives found that hoodie in a neighborhood behind the gas station. They connected DNA from it to Cox-Davis.

Cox-Davis had been facing Capital Murder charges, and life in prison with no possibility of parole if convicted. He pleaded guilty this week to murder in exchange for life in prison. He has to serve at least 30 years before being eligible for parole. That plea agreement also means he cannot appeal his conviction or his sentence.

“It is just an awful case, and this was the right decision for the victim’s family who want to put this ordeal behind them so they can mourn in peace,” Raine said.

Marcus Kenneth Cox-Davis plead guilty to murdering Donna Pena. As part of his plea agreement, he cannot appeal his conviction or the sentence. He has to serve at least 30 years in prison before being eligible for parole. (Copyright 2024 by KPRC Click2Houston - All rights reserved.)

About the Author
Karen Araiza headshot

Houston bred and super excited to be back home! I grew up in The Heights with my 8 brothers and sisters and moved back in 2024. My career as a journalist spans a lot of years -- I like to say there's a lot of tread on these tires! I'm passionate about helping people. I also really love sharing success stories and stories of redemption. Email me!

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