OCEANSIDE — Oceanside police arrested a 29-year-old Vista man on suspicion of assault with a deadly weapon late Tuesday night after he allegedly chased his girlfriend’s car and rammed her vehicle repeatedly. The victim told police she had been confronted about by her boyfriend, who accused her of infidelity, while she was at the beach. The 32-year-old woman told him the relationship was over. She got in her car to drive home, and the man began to chase her in his vehicle and rammed her vehicle several times on eastbound Wisconsin Street near Clementine Street, disabling the car, said Oceanside police spokesman Tom Bussey.